xref: /petsc/include/petscsnes.h (revision d4c6564c171d7f6bffed680177fba1cf86876815) 
1 /*
2     User interface for the nonlinear solvers package.
3 */
4 #if !defined(__PETSCSNES_H)
5 #define __PETSCSNES_H
6 #include <petscksp.h>
7 #include <petscdmtypes.h>
8 #include <petscfvtypes.h>
9 #include <petscdmdatypes.h>
10 
11 /*S
12      SNES - Abstract PETSc object that manages all nonlinear solves
13 
14    Level: beginner
15 
16   Concepts: nonlinear solvers
17 
18 .seealso:  SNESCreate(), SNESSetType(), SNESType, TS, KSP, KSP, PC, SNESDestroy()
19 S*/
20 typedef struct _p_SNES* SNES;
21 
22 /*J
23     SNESType - String with the name of a PETSc SNES method.
24 
25    Level: beginner
26 
27 .seealso: SNESSetType(), SNES, SNESCreate(), SNESDestroy(), SNESSetFromOptions()
28 J*/
29 typedef const char* SNESType;
30 #define SNESNEWTONLS     "newtonls"
31 #define SNESNEWTONTR     "newtontr"
32 #define SNESPYTHON       "python"
33 #define SNESTEST         "test"
34 #define SNESNRICHARDSON  "nrichardson"
35 #define SNESKSPONLY      "ksponly"
36 #define SNESVINEWTONRSLS "vinewtonrsls"
37 #define SNESVINEWTONSSLS "vinewtonssls"
38 #define SNESNGMRES       "ngmres"
39 #define SNESQN           "qn"
40 #define SNESSHELL        "shell"
41 #define SNESNGS          "ngs"
42 #define SNESNCG          "ncg"
43 #define SNESFAS          "fas"
44 #define SNESMS           "ms"
45 #define SNESNASM         "nasm"
46 #define SNESANDERSON     "anderson"
47 #define SNESASPIN        "aspin"
48 #define SNESCOMPOSITE    "composite"
49 
50 /* Logging support */
51 PETSC_EXTERN PetscClassId SNES_CLASSID;
52 PETSC_EXTERN PetscClassId DMSNES_CLASSID;
53 
54 PETSC_EXTERN PetscErrorCode SNESInitializePackage(void);
55 
56 PETSC_EXTERN PetscErrorCode SNESCreate(MPI_Comm,SNES*);
57 PETSC_EXTERN PetscErrorCode SNESReset(SNES);
58 PETSC_EXTERN PetscErrorCode SNESDestroy(SNES*);
59 PETSC_EXTERN PetscErrorCode SNESSetType(SNES,SNESType);
60 PETSC_EXTERN PetscErrorCode SNESMonitor(SNES,PetscInt,PetscReal);
61 PETSC_EXTERN PetscErrorCode SNESMonitorSet(SNES,PetscErrorCode(*)(SNES,PetscInt,PetscReal,void*),void *,PetscErrorCode (*)(void**));
62 PETSC_EXTERN PetscErrorCode SNESMonitorCancel(SNES);
63 PETSC_EXTERN PetscErrorCode SNESMonitorSAWs(SNES,PetscInt,PetscReal,void*);
64 PETSC_EXTERN PetscErrorCode SNESMonitorSAWsCreate(SNES,void**);
65 PETSC_EXTERN PetscErrorCode SNESMonitorSAWsDestroy(void**);
66 PETSC_EXTERN PetscErrorCode SNESSetConvergenceHistory(SNES,PetscReal[],PetscInt[],PetscInt,PetscBool );
67 PETSC_EXTERN PetscErrorCode SNESGetConvergenceHistory(SNES,PetscReal*[],PetscInt *[],PetscInt *);
68 PETSC_EXTERN PetscErrorCode SNESSetUp(SNES);
69 PETSC_EXTERN PetscErrorCode SNESSolve(SNES,Vec,Vec);
70 PETSC_EXTERN PetscErrorCode SNESSetErrorIfNotConverged(SNES,PetscBool );
71 PETSC_EXTERN PetscErrorCode SNESGetErrorIfNotConverged(SNES,PetscBool  *);
72 
73 PETSC_EXTERN PetscErrorCode SNESSetWorkVecs(SNES,PetscInt);
74 
75 PETSC_EXTERN PetscErrorCode SNESAddOptionsChecker(PetscErrorCode (*)(SNES));
76 
77 PETSC_EXTERN PetscErrorCode SNESSetUpdate(SNES, PetscErrorCode (*)(SNES, PetscInt));
78 
79 PETSC_EXTERN PetscErrorCode SNESRegisterAll(void);
80 
81 PETSC_EXTERN PetscErrorCode SNESRegister(const char[],PetscErrorCode (*)(SNES));
82 
83 PETSC_EXTERN PetscErrorCode SNESGetKSP(SNES,KSP*);
84 PETSC_EXTERN PetscErrorCode SNESSetKSP(SNES,KSP);
85 PETSC_EXTERN PetscErrorCode SNESGetSolution(SNES,Vec*);
86 PETSC_EXTERN PetscErrorCode SNESGetSolutionUpdate(SNES,Vec*);
87 PETSC_EXTERN PetscErrorCode SNESGetRhs(SNES,Vec*);
88 PETSC_EXTERN PetscErrorCode SNESView(SNES,PetscViewer);
89 PETSC_EXTERN PetscErrorCode SNESLoad(SNES,PetscViewer);
90 PETSC_STATIC_INLINE PetscErrorCode SNESViewFromOptions(SNES A,const char prefix[],const char name[]) {return PetscObjectViewFromOptions((PetscObject)A,prefix,name);}
91 PETSC_EXTERN PetscErrorCode SNESReasonView(SNES,PetscViewer);
92 PETSC_EXTERN PetscErrorCode SNESReasonViewFromOptions(SNES);
93 
94 #define SNES_FILE_CLASSID 1211224
95 
96 PETSC_EXTERN PetscErrorCode SNESSetOptionsPrefix(SNES,const char[]);
97 PETSC_EXTERN PetscErrorCode SNESAppendOptionsPrefix(SNES,const char[]);
98 PETSC_EXTERN PetscErrorCode SNESGetOptionsPrefix(SNES,const char*[]);
99 PETSC_EXTERN PetscErrorCode SNESSetFromOptions(SNES);
100 
101 PETSC_EXTERN PetscErrorCode MatCreateSNESMF(SNES,Mat*);
102 PETSC_EXTERN PetscErrorCode MatMFFDComputeJacobian(SNES,Vec,Mat,Mat,void*);
103 
104 PETSC_EXTERN PetscErrorCode MatDAADSetSNES(Mat,SNES);
105 
106 PETSC_EXTERN PetscErrorCode SNESGetType(SNES,SNESType*);
107 PETSC_EXTERN PetscErrorCode SNESMonitorDefault(SNES,PetscInt,PetscReal,void *);
108 PETSC_EXTERN PetscErrorCode SNESMonitorRange(SNES,PetscInt,PetscReal,void *);
109 PETSC_EXTERN PetscErrorCode SNESMonitorRatio(SNES,PetscInt,PetscReal,void *);
110 PETSC_EXTERN PetscErrorCode SNESMonitorSetRatio(SNES,PetscViewer);
111 PETSC_EXTERN PetscErrorCode SNESMonitorSolution(SNES,PetscInt,PetscReal,void *);
112 PETSC_EXTERN PetscErrorCode SNESMonitorResidual(SNES,PetscInt,PetscReal,void *);
113 PETSC_EXTERN PetscErrorCode SNESMonitorSolutionUpdate(SNES,PetscInt,PetscReal,void *);
114 PETSC_EXTERN PetscErrorCode SNESMonitorDefaultShort(SNES,PetscInt,PetscReal,void *);
115 PETSC_EXTERN PetscErrorCode SNESMonitorJacUpdateSpectrum(SNES,PetscInt,PetscReal,void *);
116 PETSC_EXTERN PetscErrorCode SNESMonitorFields(SNES,PetscInt,PetscReal,void *);
117 PETSC_EXTERN PetscErrorCode KSPMonitorSNES(KSP,PetscInt,PetscReal,void*);
118 PETSC_EXTERN PetscErrorCode KSPMonitorSNESLGResidualNormCreate(const char[],const char[],int,int,int,int,PetscObject**);
119 PETSC_EXTERN PetscErrorCode KSPMonitorSNESLGResidualNorm(KSP,PetscInt,PetscReal,PetscObject*);
120 PETSC_EXTERN PetscErrorCode KSPMonitorSNESLGResidualNormDestroy(PetscObject**);
121 
122 PETSC_EXTERN PetscErrorCode SNESSetTolerances(SNES,PetscReal,PetscReal,PetscReal,PetscInt,PetscInt);
123 PETSC_EXTERN PetscErrorCode SNESGetTolerances(SNES,PetscReal*,PetscReal*,PetscReal*,PetscInt*,PetscInt*);
124 PETSC_EXTERN PetscErrorCode SNESSetTrustRegionTolerance(SNES,PetscReal);
125 PETSC_EXTERN PetscErrorCode SNESGetIterationNumber(SNES,PetscInt*);
126 PETSC_EXTERN PetscErrorCode SNESSetIterationNumber(SNES,PetscInt);
127 
128 PETSC_EXTERN PetscErrorCode SNESGetNonlinearStepFailures(SNES,PetscInt*);
129 PETSC_EXTERN PetscErrorCode SNESSetMaxNonlinearStepFailures(SNES,PetscInt);
130 PETSC_EXTERN PetscErrorCode SNESGetMaxNonlinearStepFailures(SNES,PetscInt*);
131 PETSC_EXTERN PetscErrorCode SNESGetNumberFunctionEvals(SNES,PetscInt*);
132 
133 PETSC_EXTERN PetscErrorCode SNESSetLagPreconditioner(SNES,PetscInt);
134 PETSC_EXTERN PetscErrorCode SNESGetLagPreconditioner(SNES,PetscInt*);
135 PETSC_EXTERN PetscErrorCode SNESSetLagJacobian(SNES,PetscInt);
136 PETSC_EXTERN PetscErrorCode SNESGetLagJacobian(SNES,PetscInt*);
137 PETSC_EXTERN PetscErrorCode SNESSetLagPreconditionerPersists(SNES,PetscBool);
138 PETSC_EXTERN PetscErrorCode SNESSetLagJacobianPersists(SNES,PetscBool);
139 PETSC_EXTERN PetscErrorCode SNESSetGridSequence(SNES,PetscInt);
140 
141 PETSC_EXTERN PetscErrorCode SNESGetLinearSolveIterations(SNES,PetscInt*);
142 PETSC_EXTERN PetscErrorCode SNESGetLinearSolveFailures(SNES,PetscInt*);
143 PETSC_EXTERN PetscErrorCode SNESSetMaxLinearSolveFailures(SNES,PetscInt);
144 PETSC_EXTERN PetscErrorCode SNESGetMaxLinearSolveFailures(SNES,PetscInt*);
145 PETSC_EXTERN PetscErrorCode SNESSetCountersReset(SNES,PetscBool);
146 
147 PETSC_EXTERN PetscErrorCode SNESKSPSetUseEW(SNES,PetscBool );
148 PETSC_EXTERN PetscErrorCode SNESKSPGetUseEW(SNES,PetscBool *);
149 PETSC_EXTERN PetscErrorCode SNESKSPSetParametersEW(SNES,PetscInt,PetscReal,PetscReal,PetscReal,PetscReal,PetscReal,PetscReal);
150 PETSC_EXTERN PetscErrorCode SNESKSPGetParametersEW(SNES,PetscInt*,PetscReal*,PetscReal*,PetscReal*,PetscReal*,PetscReal*,PetscReal*);
151 
152 #include <petscdrawtypes.h>
153 PETSC_EXTERN PetscErrorCode SNESMonitorLGCreate(const char[],const char[],int,int,int,int,PetscObject**);
154 PETSC_EXTERN PetscErrorCode SNESMonitorLGResidualNorm(SNES,PetscInt,PetscReal,PetscObject*);
155 PETSC_EXTERN PetscErrorCode SNESMonitorLGDestroy(PetscObject**);
156 PETSC_EXTERN PetscErrorCode SNESMonitorLGRange(SNES,PetscInt,PetscReal,void*);
157 
158 PETSC_EXTERN PetscErrorCode SNESSetApplicationContext(SNES,void *);
159 PETSC_EXTERN PetscErrorCode SNESGetApplicationContext(SNES,void *);
160 PETSC_EXTERN PetscErrorCode SNESSetComputeApplicationContext(SNES,PetscErrorCode (*)(SNES,void**),PetscErrorCode (*)(void**));
161 
162 PETSC_EXTERN PetscErrorCode SNESPythonSetType(SNES,const char[]);
163 
164 PETSC_EXTERN PetscErrorCode SNESSetFunctionDomainError(SNES);
165 PETSC_EXTERN PetscErrorCode SNESGetFunctionDomainError(SNES, PetscBool *);
166 
167 /*E
168     SNESConvergedReason - reason a SNES method was said to
169          have converged or diverged
170 
171    Level: beginner
172 
173    The two most common reasons for divergence are
174 $   1) an incorrectly coded or computed Jacobian or
175 $   2) failure or lack of convergence in the linear system (in this case we recommend
176 $      testing with -pc_type lu to eliminate the linear solver as the cause of the problem).
177 
178    Diverged Reasons:
179 .    SNES_DIVERGED_LOCAL_MIN - this can only occur when using the line-search variant of SNES.
180        The line search wants to minimize Q(alpha) = 1/2 || F(x + alpha s) ||^2_2  this occurs
181        at Q'(alpha) = s^T F'(x+alpha s)^T F(x+alpha s) = 0. If s is the Newton direction - F'(x)^(-1)F(x) then
182        you get Q'(alpha) = -F(x)^T F'(x)^(-1)^T F'(x+alpha s)F(x+alpha s); when alpha = 0
183        Q'(0) = - ||F(x)||^2_2 which is always NEGATIVE if F'(x) is invertible. This means the Newton
184        direction is a descent direction and the line search should succeed if alpha is small enough.
185 
186        If F'(x) is NOT invertible AND F'(x)^T F(x) = 0 then Q'(0) = 0 and the Newton direction
187        is NOT a descent direction so the line search will fail. All one can do at this point
188        is change the initial guess and try again.
189 
190        An alternative explanation: Newton's method can be regarded as replacing the function with
191        its linear approximation and minimizing the 2-norm of that. That is F(x+s) approx F(x) + F'(x)s
192        so we minimize || F(x) + F'(x) s ||^2_2; do this using Least Squares. If F'(x) is invertible then
193        s = - F'(x)^(-1)F(x) otherwise F'(x)^T F'(x) s = -F'(x)^T F(x). If F'(x)^T F(x) is NOT zero then there
194        exists a nontrival (that is F'(x)s != 0) solution to the equation and this direction is
195        s = - [F'(x)^T F'(x)]^(-1) F'(x)^T F(x) so Q'(0) = - F(x)^T F'(x) [F'(x)^T F'(x)]^(-T) F'(x)^T F(x)
196        = - (F'(x)^T F(x)) [F'(x)^T F'(x)]^(-T) (F'(x)^T F(x)). Since we are assuming (F'(x)^T F(x)) != 0
197        and F'(x)^T F'(x) has no negative eigenvalues Q'(0) < 0 so s is a descent direction and the line
198        search should succeed for small enough alpha.
199 
200        Note that this RARELY happens in practice. Far more likely the linear system is not being solved
201        (well enough?) or the Jacobian is wrong.
202 
203    SNES_DIVERGED_MAX_IT means that the solver reached the maximum number of iterations without satisfying any
204    convergence criteria. SNES_CONVERGED_ITS means that SNESConvergedSkip() was chosen as the convergence test;
205    thus the usual convergence criteria have not been checked and may or may not be satisfied.
206 
207    Developer Notes: this must match finclude/petscsnes.h
208 
209        The string versions of these are in SNESConvergedReason, if you change any value here you must
210      also adjust that array.
211 
212    Each reason has its own manual page.
213 
214 .seealso: SNESSolve(), SNESGetConvergedReason(), KSPConvergedReason, SNESSetConvergenceTest()
215 E*/
216 typedef enum {/* converged */
217               SNES_CONVERGED_FNORM_ABS         =  2, /* ||F|| < atol */
218               SNES_CONVERGED_FNORM_RELATIVE    =  3, /* ||F|| < rtol*||F_initial|| */
219               SNES_CONVERGED_SNORM_RELATIVE    =  4, /* Newton computed step size small; || delta x || < stol || x ||*/
220               SNES_CONVERGED_ITS               =  5, /* maximum iterations reached */
221               SNES_CONVERGED_TR_DELTA          =  7,
222               /* diverged */
223               SNES_DIVERGED_FUNCTION_DOMAIN     = -1, /* the new x location passed the function is not in the domain of F */
224               SNES_DIVERGED_FUNCTION_COUNT      = -2,
225               SNES_DIVERGED_LINEAR_SOLVE        = -3, /* the linear solve failed */
226               SNES_DIVERGED_FNORM_NAN           = -4,
227               SNES_DIVERGED_MAX_IT              = -5,
228               SNES_DIVERGED_LINE_SEARCH         = -6, /* the line search failed */
229               SNES_DIVERGED_INNER               = -7, /* inner solve failed */
230               SNES_DIVERGED_LOCAL_MIN           = -8, /* || J^T b || is small, implies converged to local minimum of F() */
231               SNES_CONVERGED_ITERATING          =  0} SNESConvergedReason;
232 PETSC_EXTERN const char *const*SNESConvergedReasons;
233 
234 /*MC
235      SNES_CONVERGED_FNORM_ABS - 2-norm(F) <= abstol
236 
237    Level: beginner
238 
239 .seealso:  SNESSolve(), SNESGetConvergedReason(), SNESConvergedReason, SNESSetTolerances()
240 
241 M*/
242 
243 /*MC
244      SNES_CONVERGED_FNORM_RELATIVE - 2-norm(F) <= rtol*2-norm(F(x_0)) where x_0 is the initial guess
245 
246    Level: beginner
247 
248 .seealso:  SNESSolve(), SNESGetConvergedReason(), SNESConvergedReason, SNESSetTolerances()
249 
250 M*/
251 
252 /*MC
253      SNES_CONVERGED_SNORM_RELATIVE - The 2-norm of the last step <= stol * 2-norm(x) where x is the current
254           solution and stol is the 4th argument to SNESSetTolerances()
255 
256      Options Database Keys:
257       -snes_stol <stol> - the step tolerance
258 
259    Level: beginner
260 
261 .seealso:  SNESSolve(), SNESGetConvergedReason(), SNESConvergedReason, SNESSetTolerances()
262 
263 M*/
264 
265 /*MC
266      SNES_DIVERGED_FUNCTION_COUNT - The user provided function has been called more times then the final
267          argument to SNESSetTolerances()
268 
269    Level: beginner
270 
271 .seealso:  SNESSolve(), SNESGetConvergedReason(), SNESConvergedReason, SNESSetTolerances()
272 
273 M*/
274 
275 /*MC
276      SNES_DIVERGED_FNORM_NAN - the 2-norm of the current function evaluation is not-a-number (NaN), this
277       is usually caused by a division of 0 by 0.
278 
279    Level: beginner
280 
281 .seealso:  SNESSolve(), SNESGetConvergedReason(), SNESConvergedReason, SNESSetTolerances()
282 
283 M*/
284 
285 /*MC
286      SNES_DIVERGED_MAX_IT - SNESSolve() has reached the maximum number of iterations requested
287 
288    Level: beginner
289 
290 .seealso:  SNESSolve(), SNESGetConvergedReason(), SNESConvergedReason, SNESSetTolerances()
291 
292 M*/
293 
294 /*MC
295      SNES_DIVERGED_LINE_SEARCH - The line search has failed. This only occurs for a SNES solvers that use a line search
296 
297    Level: beginner
298 
299 .seealso:  SNESSolve(), SNESGetConvergedReason(), SNESConvergedReason, SNESSetTolerances(), SNESLineSearch
300 
301 M*/
302 
303 /*MC
304      SNES_DIVERGED_LOCAL_MIN - the algorithm seems to have stagnated at a local minimum that is not zero.
305         See the manual page for SNESConvergedReason for more details
306 
307    Level: beginner
308 
309 .seealso:  SNESSolve(), SNESGetConvergedReason(), SNESConvergedReason, SNESSetTolerances()
310 
311 M*/
312 
313 /*MC
314      SNES_CONERGED_ITERATING - this only occurs if SNESGetConvergedReason() is called during the SNESSolve()
315 
316    Level: beginner
317 
318 .seealso:  SNESSolve(), SNESGetConvergedReason(), SNESConvergedReason, SNESSetTolerances()
319 
320 M*/
321 
322 PETSC_EXTERN PetscErrorCode SNESSetConvergenceTest(SNES,PetscErrorCode (*)(SNES,PetscInt,PetscReal,PetscReal,PetscReal,SNESConvergedReason*,void*),void*,PetscErrorCode (*)(void*));
323 PETSC_EXTERN PetscErrorCode SNESConvergedDefault(SNES,PetscInt,PetscReal,PetscReal,PetscReal,SNESConvergedReason*,void*);
324 PETSC_EXTERN PetscErrorCode SNESConvergedSkip(SNES,PetscInt,PetscReal,PetscReal,PetscReal,SNESConvergedReason*,void*);
325 PETSC_EXTERN PetscErrorCode SNESGetConvergedReason(SNES,SNESConvergedReason*);
326 
327 PETSC_DEPRECATED("Use SNESConvergedSkip()") PETSC_STATIC_INLINE void SNESSkipConverged(void) { /* never called */ }
328 #define SNESSkipConverged (SNESSkipConverged, SNESConvergedSkip)
329 
330 /* --------- Solving systems of nonlinear equations --------------- */
331 PETSC_EXTERN PetscErrorCode SNESSetFunction(SNES,Vec,PetscErrorCode (*)(SNES,Vec,Vec,void*),void*);
332 PETSC_EXTERN PetscErrorCode SNESGetFunction(SNES,Vec*,PetscErrorCode (**)(SNES,Vec,Vec,void*),void**);
333 PETSC_EXTERN PetscErrorCode SNESComputeFunction(SNES,Vec,Vec);
334 
335 PETSC_EXTERN PetscErrorCode SNESSetJacobian(SNES,Mat,Mat,PetscErrorCode (*)(SNES,Vec,Mat,Mat,void*),void*);
336 PETSC_EXTERN PetscErrorCode SNESGetJacobian(SNES,Mat*,Mat*,PetscErrorCode (**)(SNES,Vec,Mat,Mat,void*),void**);
337 PETSC_EXTERN PetscErrorCode SNESObjectiveComputeFunctionDefaultFD(SNES,Vec,Vec,void*);
338 PETSC_EXTERN PetscErrorCode SNESComputeJacobianDefault(SNES,Vec,Mat,Mat,void*);
339 PETSC_EXTERN PetscErrorCode SNESComputeJacobianDefaultColor(SNES,Vec,Mat,Mat,void*);
340 PETSC_EXTERN PetscErrorCode SNESSetComputeInitialGuess(SNES,PetscErrorCode (*)(SNES,Vec,void*),void*);
341 PETSC_EXTERN PetscErrorCode SNESSetPicard(SNES,Vec,PetscErrorCode (*)(SNES,Vec,Vec,void*),Mat,Mat,PetscErrorCode (*)(SNES,Vec,Mat,Mat,void*),void*);
342 PETSC_EXTERN PetscErrorCode SNESGetPicard(SNES,Vec*,PetscErrorCode (**)(SNES,Vec,Vec,void*),Mat*,Mat*,PetscErrorCode (**)(SNES,Vec,Mat,Mat,void*),void**);
343 PETSC_EXTERN PetscErrorCode SNESSetInitialFunction(SNES,Vec);
344 
345 PETSC_EXTERN PetscErrorCode SNESSetObjective(SNES,PetscErrorCode (*)(SNES,Vec,PetscReal *,void*),void*);
346 PETSC_EXTERN PetscErrorCode SNESGetObjective(SNES,PetscErrorCode (**)(SNES,Vec,PetscReal *,void*),void**);
347 PETSC_EXTERN PetscErrorCode SNESComputeObjective(SNES,Vec,PetscReal *);
348 
349 /*E
350     SNESNormSchedule - Frequency with which the norm is computed
351 
352    Level: advanced
353 
354    Support for these is highly dependent on the solver.
355 
356    Notes:
357    This is primarily used to turn off extra norm and function computation
358    when the solvers are composed.
359 
360 .seealso: SNESSolve(), SNESGetConvergedReason(), KSPSetNormType(),
361           KSPSetConvergenceTest(), KSPSetPCSide()
362 E*/
363 
364 typedef enum {SNES_NORM_DEFAULT            = -1,
365               SNES_NORM_NONE               =  0,
366               SNES_NORM_ALWAYS             =  1,
367               SNES_NORM_INITIAL_ONLY       =  2,
368               SNES_NORM_FINAL_ONLY         =  3,
369               SNES_NORM_INITIAL_FINAL_ONLY =  4} SNESNormSchedule;
370 PETSC_EXTERN const char *const*const SNESNormSchedules;
371 
372 /*MC
373     SNES_NORM_NONE - Don't compute function and its L2 norm.
374 
375    Level: advanced
376 
377     Notes:
378     This is most useful for stationary solvers with a fixed number of iterations used as smoothers.
379 
380 .seealso: SNESNormSchedule, SNESSetNormSchedule(), SNES_NORM_DEFAULT
381 M*/
382 
383 /*MC
384     SNES_NORM_ALWAYS - Compute the function and its L2 norm at each iteration.
385 
386    Level: advanced
387 
388     Notes:
389     Most solvers will use this no matter what norm type is passed to them.
390 
391 .seealso: SNESNormSchedule, SNESSetNormSchedule(), SNES_NORM_NONE
392 M*/
393 
394 /*MC
395     SNES_NORM_INITIAL_ONLY - Compute the function and its L2 at iteration 0, but do not update it.
396 
397    Level: advanced
398 
399    Notes:
400    This method is useful in composed methods, when a true solution might actually be found before SNESSolve() is called.
401    This option enables the solve to abort on the zeroth iteration if this is the case.
402 
403    For solvers that require the computation of the L2 norm of the function as part of the method, this merely cancels
404    the norm computation at the last iteration (if possible).
405 
406 .seealso: SNESNormSchedule, SNESSetNormSchedule(), SNES_NORM_FINAL_ONLY, SNES_NORM_INITIAL_FINAL_ONLY
407 M*/
408 
409 /*MC
410     SNES_NORM_FINAL_ONLY - Compute the function and its L2 norm on only the final iteration.
411 
412    Level: advanced
413 
414    Notes:
415    For solvers that require the computation of the L2 norm of the function as part of the method, behaves
416    exactly as SNES_NORM_DEFAULT.  This method is useful when the function is gotten after SNESSolve and
417    used in subsequent computation for methods that do not need the norm computed during the rest of the
418    solution procedure.
419 
420 .seealso: SNESNormSchedule, SNESSetNormSchedule(), SNES_NORM_INITIAL_ONLY, SNES_NORM_INITIAL_FINAL_ONLY
421 M*/
422 
423 /*MC
424     SNES_NORM_INITIAL_FINAL_ONLY - Compute the function and its L2 norm on only the initial and final iterations.
425 
426    Level: advanced
427 
428    Notes:
429    This method combines the benefits of SNES_NORM_INITIAL_ONLY and SNES_NORM_FINAL_ONLY.
430 
431 .seealso: SNESNormSchedule, SNESSetNormSchedule(), SNES_NORM_SNES_NORM_INITIAL_ONLY, SNES_NORM_FINAL_ONLY
432 M*/
433 
434 PETSC_EXTERN PetscErrorCode SNESSetNormSchedule(SNES,SNESNormSchedule);
435 PETSC_EXTERN PetscErrorCode SNESGetNormSchedule(SNES,SNESNormSchedule*);
436 
437 /*E
438     SNESFunctionType - Type of function computed
439 
440    Level: advanced
441 
442    Support for these is highly dependent on the solver.
443 
444 .seealso: SNESSolve(), SNESGetConvergedReason(), KSPSetNormType(),
445           KSPSetConvergenceTest(), KSPSetPCSide()
446 E*/
447 typedef enum {SNES_FUNCTION_DEFAULT          = -1,
448               SNES_FUNCTION_UNPRECONDITIONED =  0,
449               SNES_FUNCTION_PRECONDITIONED   =  1} SNESFunctionType;
450 PETSC_EXTERN const char *const*const SNESFunctionTypes;
451 
452 PETSC_EXTERN PetscErrorCode SNESSetFunctionType(SNES,SNESFunctionType);
453 PETSC_EXTERN PetscErrorCode SNESGetFunctionType(SNES,SNESFunctionType*);
454 
455 PETSC_EXTERN PetscErrorCode SNESSetNGS(SNES,PetscErrorCode (*)(SNES,Vec,Vec,void*),void*);
456 PETSC_EXTERN PetscErrorCode SNESGetNGS(SNES,PetscErrorCode (**)(SNES,Vec,Vec,void*),void**);
457 PETSC_EXTERN PetscErrorCode SNESSetUseNGS(SNES,PetscBool);
458 PETSC_EXTERN PetscErrorCode SNESGetUseNGS(SNES,PetscBool *);
459 PETSC_EXTERN PetscErrorCode SNESComputeNGS(SNES,Vec,Vec);
460 
461 PETSC_EXTERN PetscErrorCode SNESNGSSetSweeps(SNES,PetscInt);
462 PETSC_EXTERN PetscErrorCode SNESNGSGetSweeps(SNES,PetscInt *);
463 PETSC_EXTERN PetscErrorCode SNESNGSSetTolerances(SNES,PetscReal,PetscReal,PetscReal,PetscInt);
464 PETSC_EXTERN PetscErrorCode SNESNGSGetTolerances(SNES,PetscReal*,PetscReal*,PetscReal*,PetscInt*);
465 
466 PETSC_EXTERN PetscErrorCode SNESUpdateCheckJacobian(SNES,PetscInt);
467 
468 PETSC_EXTERN PetscErrorCode SNESShellGetContext(SNES,void**);
469 PETSC_EXTERN PetscErrorCode SNESShellSetContext(SNES,void*);
470 PETSC_EXTERN PetscErrorCode SNESShellSetSolve(SNES,PetscErrorCode (*)(SNES,Vec));
471 
472 /* --------- Routines specifically for line search methods --------------- */
473 
474 typedef struct _p_LineSearch* SNESLineSearch;
475 
476 /*S
477      SNESLineSearch - Abstract PETSc object that manages line-search operations
478 
479    Level: beginner
480 
481   Concepts: nonlinear solvers, line search
482 
483 .seealso:  SNESLineSearchCreate(), SNESLineSearchSetType(), SNES
484 S*/
485 
486 /*J
487     SNESLineSearchType - String with the name of a PETSc line search method
488 
489    Level: beginner
490 
491 .seealso: SNESLineSearchSetType(), SNES
492 J*/
493 
494 typedef const char* SNESLineSearchType;
495 #define SNESLINESEARCHBT                 "bt"
496 #define SNESLINESEARCHNLEQERR            "nleqerr"
497 #define SNESLINESEARCHBASIC              "basic"
498 #define SNESLINESEARCHL2                 "l2"
499 #define SNESLINESEARCHCP                 "cp"
500 #define SNESLINESEARCHSHELL              "shell"
501 
502 PETSC_EXTERN PetscBool         SNESRegisterAllCalled;
503 PETSC_EXTERN PetscFunctionList SNESList;
504 PETSC_EXTERN PetscClassId      SNESLINESEARCH_CLASSID;
505 PETSC_EXTERN PetscBool         SNESLineSearchRegisterAllCalled;
506 PETSC_EXTERN PetscFunctionList SNESLineSearchList;
507 PETSC_EXTERN PetscLogEvent     SNESLineSearch_Apply;
508 
509 #define SNES_LINESEARCH_ORDER_LINEAR    1
510 #define SNES_LINESEARCH_ORDER_QUADRATIC 2
511 #define SNES_LINESEARCH_ORDER_CUBIC     3
512 
513 PETSC_EXTERN_TYPEDEF typedef PetscErrorCode (*SNESLineSearchVIProjectFunc)(SNES,Vec);
514 PETSC_EXTERN_TYPEDEF typedef PetscErrorCode (*SNESLineSearchVINormFunc)(SNES,Vec,Vec,PetscReal *);
515 PETSC_EXTERN_TYPEDEF typedef PetscErrorCode (*SNESLineSearchApplyFunc)(SNESLineSearch);
516 PETSC_EXTERN_TYPEDEF typedef PetscErrorCode (*SNESLineSearchUserFunc)(SNESLineSearch, void *);
517 
518 PETSC_EXTERN PetscErrorCode SNESLineSearchCreate(MPI_Comm, SNESLineSearch*);
519 PETSC_EXTERN PetscErrorCode SNESLineSearchReset(SNESLineSearch);
520 PETSC_EXTERN PetscErrorCode SNESLineSearchView(SNESLineSearch,PetscViewer);
521 PETSC_EXTERN PetscErrorCode SNESLineSearchDestroy(SNESLineSearch *);
522 PETSC_EXTERN PetscErrorCode SNESLineSearchSetType(SNESLineSearch, SNESLineSearchType);
523 PETSC_EXTERN PetscErrorCode SNESLineSearchSetFromOptions(SNESLineSearch);
524 PETSC_EXTERN PetscErrorCode SNESLineSearchSetFunction(SNESLineSearch,PetscErrorCode (*)(SNES,Vec,Vec));
525 PETSC_EXTERN PetscErrorCode SNESLineSearchSetUp(SNESLineSearch);
526 PETSC_EXTERN PetscErrorCode SNESLineSearchApply(SNESLineSearch, Vec, Vec, PetscReal *, Vec);
527 PETSC_EXTERN PetscErrorCode SNESLineSearchPreCheck(SNESLineSearch,Vec,Vec,PetscBool *);
528 PETSC_EXTERN PetscErrorCode SNESLineSearchPostCheck(SNESLineSearch,Vec,Vec,Vec,PetscBool *,PetscBool *);
529 PETSC_EXTERN PetscErrorCode SNESLineSearchSetWorkVecs(SNESLineSearch, PetscInt);
530 
531 /* set the functions for precheck and postcheck */
532 
533 PETSC_EXTERN PetscErrorCode SNESLineSearchSetPreCheck(SNESLineSearch, PetscErrorCode (*)(SNESLineSearch,Vec,Vec,PetscBool*,void*), void *ctx);
534 PETSC_EXTERN PetscErrorCode SNESLineSearchSetPostCheck(SNESLineSearch, PetscErrorCode (*)(SNESLineSearch,Vec,Vec,Vec,PetscBool *,PetscBool *,void*), void *ctx);
535 
536 PETSC_EXTERN PetscErrorCode SNESLineSearchGetPreCheck(SNESLineSearch, PetscErrorCode (**)(SNESLineSearch,Vec,Vec,PetscBool*,void*), void **ctx);
537 PETSC_EXTERN PetscErrorCode SNESLineSearchGetPostCheck(SNESLineSearch, PetscErrorCode (**)(SNESLineSearch,Vec,Vec,Vec,PetscBool *,PetscBool *,void*), void **ctx);
538 
539 /* set the functions for VI-specific line search operations */
540 
541 PETSC_EXTERN PetscErrorCode SNESLineSearchSetVIFunctions(SNESLineSearch, SNESLineSearchVIProjectFunc, SNESLineSearchVINormFunc);
542 PETSC_EXTERN PetscErrorCode SNESLineSearchGetVIFunctions(SNESLineSearch, SNESLineSearchVIProjectFunc*, SNESLineSearchVINormFunc*);
543 
544 /* pointers to the associated SNES in order to be able to get the function evaluation out */
545 PETSC_EXTERN PetscErrorCode SNESLineSearchSetSNES(SNESLineSearch,SNES);
546 PETSC_EXTERN PetscErrorCode SNESLineSearchGetSNES(SNESLineSearch,SNES*);
547 
548 /* set and get the parameters and vectors */
549 PETSC_EXTERN PetscErrorCode SNESLineSearchGetTolerances(SNESLineSearch,PetscReal*,PetscReal*,PetscReal*,PetscReal*,PetscReal*,PetscInt*);
550 PETSC_EXTERN PetscErrorCode SNESLineSearchSetTolerances(SNESLineSearch,PetscReal,PetscReal,PetscReal,PetscReal,PetscReal,PetscInt);
551 
552 PETSC_EXTERN PetscErrorCode SNESLineSearchPreCheckPicard(SNESLineSearch,Vec,Vec,PetscBool*,void*);
553 
554 PETSC_EXTERN PetscErrorCode SNESLineSearchGetLambda(SNESLineSearch,PetscReal*);
555 PETSC_EXTERN PetscErrorCode SNESLineSearchSetLambda(SNESLineSearch,PetscReal);
556 
557 PETSC_EXTERN PetscErrorCode SNESLineSearchGetDamping(SNESLineSearch,PetscReal*);
558 PETSC_EXTERN PetscErrorCode SNESLineSearchSetDamping(SNESLineSearch,PetscReal);
559 
560 PETSC_EXTERN PetscErrorCode SNESLineSearchGetOrder(SNESLineSearch,PetscInt *order);
561 PETSC_EXTERN PetscErrorCode SNESLineSearchSetOrder(SNESLineSearch,PetscInt order);
562 
563 PETSC_EXTERN PetscErrorCode SNESLineSearchGetSuccess(SNESLineSearch, PetscBool*);
564 PETSC_EXTERN PetscErrorCode SNESLineSearchSetSuccess(SNESLineSearch, PetscBool);
565 
566 PETSC_EXTERN PetscErrorCode SNESLineSearchGetVecs(SNESLineSearch,Vec*,Vec*,Vec*,Vec*,Vec*);
567 PETSC_EXTERN PetscErrorCode SNESLineSearchSetVecs(SNESLineSearch,Vec,Vec,Vec,Vec,Vec);
568 
569 PETSC_EXTERN PetscErrorCode SNESLineSearchGetNorms(SNESLineSearch, PetscReal *, PetscReal *, PetscReal *);
570 PETSC_EXTERN PetscErrorCode SNESLineSearchSetNorms(SNESLineSearch, PetscReal, PetscReal, PetscReal);
571 PETSC_EXTERN PetscErrorCode SNESLineSearchComputeNorms(SNESLineSearch);
572 PETSC_EXTERN PetscErrorCode SNESLineSearchSetComputeNorms(SNESLineSearch, PetscBool);
573 
574 PETSC_EXTERN PetscErrorCode SNESLineSearchSetMonitor(SNESLineSearch, PetscBool);
575 PETSC_EXTERN PetscErrorCode SNESLineSearchGetMonitor(SNESLineSearch, PetscViewer*);
576 
577 PETSC_EXTERN PetscErrorCode SNESLineSearchAppendOptionsPrefix(SNESLineSearch, const char prefix[]);
578 PETSC_EXTERN PetscErrorCode SNESLineSearchGetOptionsPrefix(SNESLineSearch, const char *prefix[]);
579 
580 
581 /* Shell interface functions */
582 PETSC_EXTERN PetscErrorCode SNESLineSearchShellSetUserFunc(SNESLineSearch,SNESLineSearchUserFunc,void*);
583 PETSC_EXTERN PetscErrorCode SNESLineSearchShellGetUserFunc(SNESLineSearch,SNESLineSearchUserFunc*,void**);
584 
585 /* BT interface functions */
586 PETSC_EXTERN PetscErrorCode SNESLineSearchBTSetAlpha(SNESLineSearch, PetscReal);
587 PETSC_EXTERN PetscErrorCode SNESLineSearchBTGetAlpha(SNESLineSearch, PetscReal*);
588 
589 /*register line search types */
590 PETSC_EXTERN PetscErrorCode SNESLineSearchRegister(const char[],PetscErrorCode(*)(SNESLineSearch));
591 PETSC_EXTERN PetscErrorCode SNESLineSearchRegisterAll(void);
592 
593 /* Routines for VI solver */
594 PETSC_EXTERN PetscErrorCode SNESVISetVariableBounds(SNES,Vec,Vec);
595 PETSC_EXTERN PetscErrorCode SNESVISetComputeVariableBounds(SNES, PetscErrorCode (*)(SNES,Vec,Vec));
596 PETSC_EXTERN PetscErrorCode SNESVIGetInactiveSet(SNES,IS*);
597 PETSC_EXTERN PetscErrorCode SNESVIGetActiveSetIS(SNES,Vec,Vec,IS*);
598 PETSC_EXTERN PetscErrorCode SNESVIComputeInactiveSetFnorm(SNES,Vec,Vec,PetscReal*);
599 PETSC_EXTERN PetscErrorCode SNESVISetRedundancyCheck(SNES,PetscErrorCode(*)(SNES,IS,IS*,void*),void*);
600 
601 PETSC_EXTERN PetscErrorCode SNESTestLocalMin(SNES);
602 
603 /* Should this routine be private? */
604 PETSC_EXTERN PetscErrorCode SNESComputeJacobian(SNES,Vec,Mat,Mat);
605 
606 PETSC_EXTERN PetscErrorCode SNESSetDM(SNES,DM);
607 PETSC_EXTERN PetscErrorCode SNESGetDM(SNES,DM*);
608 PETSC_EXTERN PetscErrorCode SNESSetNPC(SNES,SNES);
609 PETSC_EXTERN PetscErrorCode SNESGetNPC(SNES,SNES*);
610 PETSC_EXTERN PetscErrorCode SNESHasNPC(SNES,PetscBool*);
611 PETSC_EXTERN PetscErrorCode SNESApplyNPC(SNES,Vec,Vec,Vec);
612 PETSC_EXTERN PetscErrorCode SNESGetNPCFunction(SNES,Vec,PetscReal*);
613 PETSC_EXTERN PetscErrorCode SNESComputeFunctionDefaultNPC(SNES,Vec,Vec);
614 PETSC_EXTERN PetscErrorCode SNESSetNPCSide(SNES,PCSide);
615 PETSC_EXTERN PetscErrorCode SNESGetNPCSide(SNES,PCSide*);
616 PETSC_EXTERN PetscErrorCode SNESSetLineSearch(SNES,SNESLineSearch);
617 PETSC_EXTERN PetscErrorCode SNESGetLineSearch(SNES,SNESLineSearch*);
618 PETSC_EXTERN PetscErrorCode SNESRestrictHookAdd(SNES,PetscErrorCode (*)(SNES,SNES,void*),void*);
619 PETSC_EXTERN PetscErrorCode SNESRestrictHooksRun(SNES,SNES);
620 
621 PETSC_DEPRECATED("Use SNESGetLineSearch()") PETSC_STATIC_INLINE PetscErrorCode SNESGetSNESLineSearch(SNES snes,SNESLineSearch *ls) {return SNESGetLineSearch(snes,ls);}
622 PETSC_DEPRECATED("Use SNESSetLineSearch()") PETSC_STATIC_INLINE PetscErrorCode SNESSetSNESLineSearch(SNES snes,SNESLineSearch ls) {return SNESSetLineSearch(snes,ls);}
623 
624 PETSC_EXTERN PetscErrorCode SNESSetUpMatrices(SNES);
625 PETSC_EXTERN PetscErrorCode DMSNESSetFunction(DM,PetscErrorCode(*)(SNES,Vec,Vec,void*),void*);
626 PETSC_EXTERN PetscErrorCode DMSNESGetFunction(DM,PetscErrorCode(**)(SNES,Vec,Vec,void*),void**);
627 PETSC_EXTERN PetscErrorCode DMSNESSetNGS(DM,PetscErrorCode(*)(SNES,Vec,Vec,void*),void*);
628 PETSC_EXTERN PetscErrorCode DMSNESGetNGS(DM,PetscErrorCode(**)(SNES,Vec,Vec,void*),void**);
629 PETSC_EXTERN PetscErrorCode DMSNESSetJacobian(DM,PetscErrorCode(*)(SNES,Vec,Mat,Mat,void*),void*);
630 PETSC_EXTERN PetscErrorCode DMSNESGetJacobian(DM,PetscErrorCode(**)(SNES,Vec,Mat,Mat,void*),void**);
631 PETSC_EXTERN PetscErrorCode DMSNESSetPicard(DM,PetscErrorCode(*)(SNES,Vec,Vec,void*),PetscErrorCode(*)(SNES,Vec,Mat,Mat,void*),void*);
632 PETSC_EXTERN PetscErrorCode DMSNESGetPicard(DM,PetscErrorCode(**)(SNES,Vec,Vec,void*),PetscErrorCode(**)(SNES,Vec,Mat,Mat,void*),void**);
633 PETSC_EXTERN PetscErrorCode DMSNESSetObjective(DM,PetscErrorCode (*)(SNES,Vec,PetscReal *,void*),void*);
634 PETSC_EXTERN PetscErrorCode DMSNESGetObjective(DM,PetscErrorCode (**)(SNES,Vec,PetscReal *,void*),void**);
635 
636 PETSC_EXTERN_TYPEDEF typedef PetscErrorCode (*DMDASNESFunction)(DMDALocalInfo*,void*,void*,void*);
637 PETSC_EXTERN_TYPEDEF typedef PetscErrorCode (*DMDASNESJacobian)(DMDALocalInfo*,void*,Mat,Mat,void*);
638 PETSC_EXTERN_TYPEDEF typedef PetscErrorCode (*DMDASNESObjective)(DMDALocalInfo*,void*,PetscReal*,void*);
639 
640 PETSC_EXTERN PetscErrorCode DMDASNESSetFunctionLocal(DM,InsertMode,DMDASNESFunction,void*);
641 PETSC_EXTERN PetscErrorCode DMDASNESSetJacobianLocal(DM,DMDASNESJacobian,void*);
642 PETSC_EXTERN PetscErrorCode DMDASNESSetObjectiveLocal(DM,DMDASNESObjective,void*);
643 PETSC_EXTERN PetscErrorCode DMDASNESSetPicardLocal(DM,InsertMode,PetscErrorCode (*)(DMDALocalInfo*,void*,void*,void*),PetscErrorCode (*)(DMDALocalInfo*,void*,Mat,Mat,void*),void*);
644 
645 PETSC_EXTERN PetscErrorCode DMPlexSNESGetGeometryFEM(DM,Vec*);
646 PETSC_EXTERN PetscErrorCode DMPlexSNESGetGeometryFVM(DM,Vec*,Vec*,PetscReal*);
647 PETSC_EXTERN PetscErrorCode DMPlexSNESGetGradientDM(DM,PetscFV,DM*);
648 PETSC_EXTERN PetscErrorCode DMPlexGetCellFields(DM, PetscInt, PetscInt, Vec, Vec, Vec, PetscScalar **, PetscScalar **, PetscScalar **);
649 PETSC_EXTERN PetscErrorCode DMPlexRestoreCellFields(DM, PetscInt, PetscInt, Vec, Vec, Vec, PetscScalar **, PetscScalar **, PetscScalar **);
650 PETSC_EXTERN PetscErrorCode DMPlexGetFaceFields(DM, PetscInt, PetscInt, Vec, Vec, Vec, Vec, Vec, PetscScalar **, PetscScalar **);
651 PETSC_EXTERN PetscErrorCode DMPlexRestoreFaceFields(DM, PetscInt, PetscInt, Vec, Vec, Vec, Vec, Vec, PetscScalar **, PetscScalar **);
652 PETSC_EXTERN PetscErrorCode DMPlexGetFaceGeometry(DM, PetscInt, PetscInt, Vec, Vec, PetscFVFaceGeom **, PetscReal **);
653 PETSC_EXTERN PetscErrorCode DMPlexRestoreFaceGeometry(DM, PetscInt, PetscInt, Vec, Vec, PetscFVFaceGeom **, PetscReal **);
654 
655 PETSC_EXTERN PetscErrorCode DMSNESSetFunctionLocal(DM,PetscErrorCode (*)(DM,Vec,Vec,void*),void*);
656 PETSC_EXTERN PetscErrorCode DMSNESSetJacobianLocal(DM,PetscErrorCode (*)(DM,Vec,Mat,Mat,void*),void*);
657 
658 /* Routines for Multiblock solver */
659 PETSC_EXTERN PetscErrorCode SNESMultiblockSetFields(SNES, const char [], PetscInt, const PetscInt *);
660 PETSC_EXTERN PetscErrorCode SNESMultiblockSetIS(SNES, const char [], IS);
661 PETSC_EXTERN PetscErrorCode SNESMultiblockSetBlockSize(SNES, PetscInt);
662 PETSC_EXTERN PetscErrorCode SNESMultiblockSetType(SNES, PCCompositeType);
663 
664 /*J
665     SNESMSType - String with the name of a PETSc SNESMS method.
666 
667    Level: intermediate
668 
669 .seealso: SNESMSSetType(), SNES
670 J*/
671 typedef const char* SNESMSType;
672 #define SNESMSM62       "m62"
673 #define SNESMSEULER     "euler"
674 #define SNESMSJAMESON83 "jameson83"
675 #define SNESMSVLTP21    "vltp21"
676 #define SNESMSVLTP31    "vltp31"
677 #define SNESMSVLTP41    "vltp41"
678 #define SNESMSVLTP51    "vltp51"
679 #define SNESMSVLTP61    "vltp61"
680 
681 PETSC_EXTERN PetscErrorCode SNESMSRegister(SNESMSType,PetscInt,PetscInt,PetscReal,const PetscReal[],const PetscReal[],const PetscReal[]);
682 PETSC_EXTERN PetscErrorCode SNESMSSetType(SNES,SNESMSType);
683 PETSC_EXTERN PetscErrorCode SNESMSFinalizePackage(void);
684 PETSC_EXTERN PetscErrorCode SNESMSInitializePackage(void);
685 PETSC_EXTERN PetscErrorCode SNESMSRegisterDestroy(void);
686 PETSC_EXTERN PetscErrorCode SNESMSRegisterAll(void);
687 
688 /* routines for NGMRES solver */
689 
690 typedef enum {
691   SNES_NGMRES_RESTART_NONE       = 0,
692   SNES_NGMRES_RESTART_PERIODIC   = 1,
693   SNES_NGMRES_RESTART_DIFFERENCE = 2} SNESNGMRESRestartType;
694 PETSC_EXTERN const char *const SNESNGMRESRestartTypes[];
695 
696 typedef enum {
697   SNES_NGMRES_SELECT_NONE       = 0,
698   SNES_NGMRES_SELECT_DIFFERENCE = 1,
699   SNES_NGMRES_SELECT_LINESEARCH = 2} SNESNGMRESSelectType;
700 PETSC_EXTERN const char *const SNESNGMRESSelectTypes[];
701 
702 PETSC_EXTERN PetscErrorCode SNESNGMRESSetRestartType(SNES, SNESNGMRESRestartType);
703 PETSC_EXTERN PetscErrorCode SNESNGMRESSetSelectType(SNES, SNESNGMRESSelectType);
704 
705 /* routines for NCG solver */
706 
707 typedef enum {
708   SNES_NCG_FR    = 0,
709   SNES_NCG_PRP   = 1,
710   SNES_NCG_HS    = 2,
711   SNES_NCG_DY    = 3,
712   SNES_NCG_CD    = 4} SNESNCGType;
713 PETSC_EXTERN const char *const SNESNCGTypes[];
714 
715 PETSC_EXTERN PetscErrorCode SNESNCGSetType(SNES, SNESNCGType);
716 
717 typedef enum {SNES_QN_SCALE_DEFAULT    = 0,
718               SNES_QN_SCALE_NONE       = 1,
719               SNES_QN_SCALE_SHANNO     = 2,
720               SNES_QN_SCALE_LINESEARCH = 3,
721               SNES_QN_SCALE_JACOBIAN   = 4} SNESQNScaleType;
722 PETSC_EXTERN const char *const SNESQNScaleTypes[];
723 typedef enum {SNES_QN_RESTART_DEFAULT  = 0,
724               SNES_QN_RESTART_NONE     = 1,
725               SNES_QN_RESTART_POWELL   = 2,
726               SNES_QN_RESTART_PERIODIC = 3} SNESQNRestartType;
727 PETSC_EXTERN const char *const SNESQNRestartTypes[];
728 typedef enum {SNES_QN_LBFGS      = 0,
729               SNES_QN_BROYDEN    = 1,
730               SNES_QN_BADBROYDEN = 2
731              } SNESQNType;
732 PETSC_EXTERN const char *const SNESQNTypes[];
733 
734 PETSC_EXTERN PetscErrorCode SNESQNSetType(SNES, SNESQNType);
735 PETSC_EXTERN PetscErrorCode SNESQNSetScaleType(SNES, SNESQNScaleType);
736 PETSC_EXTERN PetscErrorCode SNESQNSetRestartType(SNES, SNESQNRestartType);
737 
738 PETSC_EXTERN PetscErrorCode SNESNASMGetType(SNES,PCASMType*);
739 PETSC_EXTERN PetscErrorCode SNESNASMSetType(SNES,PCASMType);
740 PETSC_EXTERN PetscErrorCode SNESNASMGetSubdomains(SNES,PetscInt*,SNES**,VecScatter**,VecScatter**,VecScatter**);
741 PETSC_EXTERN PetscErrorCode SNESNASMSetSubdomains(SNES,PetscInt,SNES*,VecScatter*,VecScatter*,VecScatter*);
742 PETSC_EXTERN PetscErrorCode SNESNASMSetDamping(SNES,PetscReal);
743 PETSC_EXTERN PetscErrorCode SNESNASMGetDamping(SNES,PetscReal*);
744 PETSC_EXTERN PetscErrorCode SNESNASMGetSubdomainVecs(SNES,PetscInt*,Vec**,Vec**,Vec**,Vec**);
745 PETSC_EXTERN PetscErrorCode SNESNASMSetComputeFinalJacobian(SNES,PetscBool);
746 
747 typedef enum {SNES_COMPOSITE_ADDITIVE,SNES_COMPOSITE_MULTIPLICATIVE,SNES_COMPOSITE_ADDITIVEOPTIMAL} SNESCompositeType;
748 PETSC_EXTERN const char *const SNESCompositeTypes[];
749 
750 PETSC_EXTERN PetscErrorCode SNESCompositeSetType(SNES,SNESCompositeType);
751 PETSC_EXTERN PetscErrorCode SNESCompositeAddSNES(SNES,SNESType);
752 PETSC_EXTERN PetscErrorCode SNESCompositeGetSNES(SNES,PetscInt,SNES *);
753 PETSC_EXTERN PetscErrorCode SNESCompositeGetNumber(SNES,PetscInt*);
754 PETSC_EXTERN PetscErrorCode SNESCompositeSetDamping(SNES,PetscInt,PetscReal);
755 
756 /*E
757     SNESFASType - Determines the type of nonlinear multigrid method that is run.
758 
759    Level: beginner
760 
761    Values:
762 +  SNES_FAS_MULTIPLICATIVE (default) - traditional V or W cycle as determined by SNESFASSetCycles()
763 .  SNES_FAS_ADDITIVE                 - additive FAS cycle
764 .  SNES_FAS_FULL                     - full FAS cycle
765 -  SNES_FAS_KASKADE                  - Kaskade FAS cycle
766 .seealso: PCMGSetType(), PCMGType
767 
768 E*/
769 typedef enum { SNES_FAS_MULTIPLICATIVE, SNES_FAS_ADDITIVE, SNES_FAS_FULL, SNES_FAS_KASKADE } SNESFASType;
770 PETSC_EXTERN const char *const  SNESFASTypes[];
771 
772 /* called on the finest level FAS instance*/
773 PETSC_EXTERN PetscErrorCode SNESFASSetType(SNES, SNESFASType);
774 PETSC_EXTERN PetscErrorCode SNESFASGetType(SNES, SNESFASType*);
775 PETSC_EXTERN PetscErrorCode SNESFASSetLevels(SNES, PetscInt, MPI_Comm *);
776 PETSC_EXTERN PetscErrorCode SNESFASGetLevels(SNES, PetscInt *);
777 PETSC_EXTERN PetscErrorCode SNESFASGetCycleSNES(SNES, PetscInt, SNES*);
778 PETSC_EXTERN PetscErrorCode SNESFASSetNumberSmoothUp(SNES, PetscInt);
779 PETSC_EXTERN PetscErrorCode SNESFASSetNumberSmoothDown(SNES, PetscInt);
780 PETSC_EXTERN PetscErrorCode SNESFASSetCycles(SNES, PetscInt);
781 PETSC_EXTERN PetscErrorCode SNESFASSetMonitor(SNES, PetscBool);
782 PETSC_EXTERN PetscErrorCode SNESFASSetLog(SNES, PetscBool);
783 
784 PETSC_EXTERN PetscErrorCode SNESFASSetGalerkin(SNES, PetscBool);
785 PETSC_EXTERN PetscErrorCode SNESFASGetGalerkin(SNES, PetscBool*);
786 
787 /* called on any level -- "Cycle" FAS instance */
788 PETSC_EXTERN PetscErrorCode SNESFASCycleGetSmoother(SNES, SNES*);
789 PETSC_EXTERN PetscErrorCode SNESFASCycleGetSmootherUp(SNES, SNES*);
790 PETSC_EXTERN PetscErrorCode SNESFASCycleGetSmootherDown(SNES, SNES*);
791 PETSC_EXTERN PetscErrorCode SNESFASCycleGetCorrection(SNES, SNES*);
792 PETSC_EXTERN PetscErrorCode SNESFASCycleGetInterpolation(SNES, Mat*);
793 PETSC_EXTERN PetscErrorCode SNESFASCycleGetRestriction(SNES, Mat*);
794 PETSC_EXTERN PetscErrorCode SNESFASCycleGetInjection(SNES, Mat*);
795 PETSC_EXTERN PetscErrorCode SNESFASCycleGetRScale(SNES, Vec*);
796 PETSC_EXTERN PetscErrorCode SNESFASCycleSetCycles(SNES, PetscInt);
797 PETSC_EXTERN PetscErrorCode SNESFASCycleIsFine(SNES, PetscBool*);
798 
799 /* called on the (outer) finest level FAS to set/get parameters on any level instance */
800 PETSC_EXTERN PetscErrorCode SNESFASSetInterpolation(SNES, PetscInt, Mat);
801 PETSC_EXTERN PetscErrorCode SNESFASGetInterpolation(SNES, PetscInt, Mat*);
802 PETSC_EXTERN PetscErrorCode SNESFASSetRestriction(SNES, PetscInt, Mat);
803 PETSC_EXTERN PetscErrorCode SNESFASGetRestriction(SNES, PetscInt, Mat*);
804 PETSC_EXTERN PetscErrorCode SNESFASSetInjection(SNES, PetscInt, Mat);
805 PETSC_EXTERN PetscErrorCode SNESFASGetInjection(SNES, PetscInt, Mat*);
806 PETSC_EXTERN PetscErrorCode SNESFASSetRScale(SNES, PetscInt, Vec);
807 PETSC_EXTERN PetscErrorCode SNESFASGetRScale(SNES, PetscInt, Vec*);
808 PETSC_EXTERN PetscErrorCode SNESFASSetContinuation(SNES,PetscBool);
809 
810 PETSC_EXTERN PetscErrorCode SNESFASGetSmoother(SNES,     PetscInt, SNES*);
811 PETSC_EXTERN PetscErrorCode SNESFASGetSmootherUp(SNES,   PetscInt, SNES*);
812 PETSC_EXTERN PetscErrorCode SNESFASGetSmootherDown(SNES, PetscInt, SNES*);
813 PETSC_EXTERN PetscErrorCode SNESFASGetCoarseSolve(SNES, SNES*);
814 
815 /* parameters for full FAS */
816 PETSC_EXTERN PetscErrorCode SNESFASFullSetDownSweep(SNES,PetscBool);
817 PETSC_EXTERN PetscErrorCode SNESFASCreateCoarseVec(SNES,Vec*);
818 PETSC_EXTERN PetscErrorCode SNESFASRestrict(SNES,Vec,Vec);
819 
820 #endif
821