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 <petscdmdatypes.h> 9 10 /*S 11 SNES - Abstract PETSc object that manages all nonlinear solves 12 13 Level: beginner 14 15 Concepts: nonlinear solvers 16 17 .seealso: SNESCreate(), SNESSetType(), SNESType, TS, KSP, KSP, PC 18 S*/ 19 typedef struct _p_SNES* SNES; 20 21 /*J 22 SNESType - String with the name of a PETSc SNES method or the creation function 23 with an optional dynamic library name, for example 24 http://www.mcs.anl.gov/petsc/lib.a:mysnescreate() 25 26 Level: beginner 27 28 .seealso: SNESSetType(), SNES 29 J*/ 30 typedef const char* SNESType; 31 #define SNESNEWTONLS "newtonls" 32 #define SNESNEWTONTR "newtontr" 33 #define SNESPYTHON "python" 34 #define SNESTEST "test" 35 #define SNESNRICHARDSON "nrichardson" 36 #define SNESKSPONLY "ksponly" 37 #define SNESVINEWTONRSLS "vinewtonrsls" 38 #define SNESVINEWTONSSLS "vinewtonssls" 39 #define SNESNGMRES "ngmres" 40 #define SNESQN "qn" 41 #define SNESSHELL "shell" 42 #define SNESGS "gs" 43 #define SNESNCG "ncg" 44 #define SNESFAS "fas" 45 #define SNESMS "ms" 46 #define SNESNASM "nasm" 47 #define SNESANDERSON "anderson" 48 #define SNESASPIN "aspin" 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 SNESSetConvergenceHistory(SNES,PetscReal[],PetscInt[],PetscInt,PetscBool ); 64 PETSC_EXTERN PetscErrorCode SNESGetConvergenceHistory(SNES,PetscReal*[],PetscInt *[],PetscInt *); 65 PETSC_EXTERN PetscErrorCode SNESSetUp(SNES); 66 PETSC_EXTERN PetscErrorCode SNESSolve(SNES,Vec,Vec); 67 PETSC_EXTERN PetscErrorCode SNESSetErrorIfNotConverged(SNES,PetscBool ); 68 PETSC_EXTERN PetscErrorCode SNESGetErrorIfNotConverged(SNES,PetscBool *); 69 70 PETSC_EXTERN PetscErrorCode SNESSetWorkVecs(SNES,PetscInt); 71 72 PETSC_EXTERN PetscErrorCode SNESAddOptionsChecker(PetscErrorCode (*)(SNES)); 73 74 PETSC_EXTERN PetscErrorCode SNESSetUpdate(SNES, PetscErrorCode (*)(SNES, PetscInt)); 75 76 PETSC_EXTERN PetscErrorCode SNESRegisterAll(void); 77 78 PETSC_EXTERN PetscErrorCode SNESRegister(const char[],PetscErrorCode (*)(SNES)); 79 80 PETSC_EXTERN PetscErrorCode SNESGetKSP(SNES,KSP*); 81 PETSC_EXTERN PetscErrorCode SNESSetKSP(SNES,KSP); 82 PETSC_EXTERN PetscErrorCode SNESGetSolution(SNES,Vec*); 83 PETSC_EXTERN PetscErrorCode SNESGetSolutionUpdate(SNES,Vec*); 84 PETSC_EXTERN PetscErrorCode SNESGetRhs(SNES,Vec*); 85 PETSC_EXTERN PetscErrorCode SNESView(SNES,PetscViewer); 86 PETSC_EXTERN PetscErrorCode SNESLoad(SNES,PetscViewer); 87 88 #define SNES_FILE_CLASSID 1211224 89 90 PETSC_EXTERN PetscErrorCode SNESSetOptionsPrefix(SNES,const char[]); 91 PETSC_EXTERN PetscErrorCode SNESAppendOptionsPrefix(SNES,const char[]); 92 PETSC_EXTERN PetscErrorCode SNESGetOptionsPrefix(SNES,const char*[]); 93 PETSC_EXTERN PetscErrorCode SNESSetFromOptions(SNES); 94 95 PETSC_EXTERN PetscErrorCode MatCreateSNESMF(SNES,Mat*); 96 PETSC_EXTERN PetscErrorCode MatMFFDComputeJacobian(SNES,Vec,Mat*,Mat*,MatStructure*,void*); 97 98 PETSC_EXTERN PetscErrorCode MatDAADSetSNES(Mat,SNES); 99 100 PETSC_EXTERN PetscErrorCode SNESGetType(SNES,SNESType*); 101 PETSC_EXTERN PetscErrorCode SNESMonitorDefault(SNES,PetscInt,PetscReal,void *); 102 PETSC_EXTERN PetscErrorCode SNESMonitorRange(SNES,PetscInt,PetscReal,void *); 103 PETSC_EXTERN PetscErrorCode SNESMonitorRatio(SNES,PetscInt,PetscReal,void *); 104 PETSC_EXTERN PetscErrorCode SNESMonitorSetRatio(SNES,PetscViewer); 105 PETSC_EXTERN PetscErrorCode SNESMonitorSolution(SNES,PetscInt,PetscReal,void *); 106 PETSC_EXTERN PetscErrorCode SNESMonitorResidual(SNES,PetscInt,PetscReal,void *); 107 PETSC_EXTERN PetscErrorCode SNESMonitorSolutionUpdate(SNES,PetscInt,PetscReal,void *); 108 PETSC_EXTERN PetscErrorCode SNESMonitorDefaultShort(SNES,PetscInt,PetscReal,void *); 109 PETSC_EXTERN PetscErrorCode SNESMonitorJacUpdateSpectrum(SNES,PetscInt,PetscReal,void *); 110 PETSC_EXTERN PetscErrorCode SNESSetTolerances(SNES,PetscReal,PetscReal,PetscReal,PetscInt,PetscInt); 111 PETSC_EXTERN PetscErrorCode SNESGetTolerances(SNES,PetscReal*,PetscReal*,PetscReal*,PetscInt*,PetscInt*); 112 PETSC_EXTERN PetscErrorCode SNESSetTrustRegionTolerance(SNES,PetscReal); 113 PETSC_EXTERN PetscErrorCode SNESGetFunctionNorm(SNES,PetscReal*); 114 PETSC_EXTERN PetscErrorCode SNESSetFunctionNorm(SNES,PetscReal); 115 PETSC_EXTERN PetscErrorCode SNESGetIterationNumber(SNES,PetscInt*); 116 PETSC_EXTERN PetscErrorCode SNESSetIterationNumber(SNES,PetscInt); 117 118 PETSC_EXTERN PetscErrorCode SNESGetNonlinearStepFailures(SNES,PetscInt*); 119 PETSC_EXTERN PetscErrorCode SNESSetMaxNonlinearStepFailures(SNES,PetscInt); 120 PETSC_EXTERN PetscErrorCode SNESGetMaxNonlinearStepFailures(SNES,PetscInt*); 121 PETSC_EXTERN PetscErrorCode SNESGetNumberFunctionEvals(SNES,PetscInt*); 122 123 PETSC_EXTERN PetscErrorCode SNESSetLagPreconditioner(SNES,PetscInt); 124 PETSC_EXTERN PetscErrorCode SNESGetLagPreconditioner(SNES,PetscInt*); 125 PETSC_EXTERN PetscErrorCode SNESSetLagJacobian(SNES,PetscInt); 126 PETSC_EXTERN PetscErrorCode SNESGetLagJacobian(SNES,PetscInt*); 127 PETSC_EXTERN PetscErrorCode SNESSetGridSequence(SNES,PetscInt); 128 129 PETSC_EXTERN PetscErrorCode SNESGetLinearSolveIterations(SNES,PetscInt*); 130 PETSC_EXTERN PetscErrorCode SNESGetLinearSolveFailures(SNES,PetscInt*); 131 PETSC_EXTERN PetscErrorCode SNESSetMaxLinearSolveFailures(SNES,PetscInt); 132 PETSC_EXTERN PetscErrorCode SNESGetMaxLinearSolveFailures(SNES,PetscInt*); 133 134 PETSC_EXTERN PetscErrorCode SNESKSPSetUseEW(SNES,PetscBool ); 135 PETSC_EXTERN PetscErrorCode SNESKSPGetUseEW(SNES,PetscBool *); 136 PETSC_EXTERN PetscErrorCode SNESKSPSetParametersEW(SNES,PetscInt,PetscReal,PetscReal,PetscReal,PetscReal,PetscReal,PetscReal); 137 PETSC_EXTERN PetscErrorCode SNESKSPGetParametersEW(SNES,PetscInt*,PetscReal*,PetscReal*,PetscReal*,PetscReal*,PetscReal*,PetscReal*); 138 139 #include <petscdrawtypes.h> 140 PETSC_EXTERN PetscErrorCode SNESMonitorLGCreate(const char[],const char[],int,int,int,int,PetscDrawLG*); 141 PETSC_EXTERN PetscErrorCode SNESMonitorLGResidualNorm(SNES,PetscInt,PetscReal,void*); 142 PETSC_EXTERN PetscErrorCode SNESMonitorLGDestroy(PetscDrawLG*); 143 PETSC_EXTERN PetscErrorCode SNESMonitorLGRange(SNES,PetscInt,PetscReal,void*); 144 145 PETSC_EXTERN PetscErrorCode SNESSetApplicationContext(SNES,void *); 146 PETSC_EXTERN PetscErrorCode SNESGetApplicationContext(SNES,void *); 147 PETSC_EXTERN PetscErrorCode SNESSetComputeApplicationContext(SNES,PetscErrorCode (*)(SNES,void**),PetscErrorCode (*)(void**)); 148 149 PETSC_EXTERN PetscErrorCode SNESPythonSetType(SNES,const char[]); 150 151 PETSC_EXTERN PetscErrorCode SNESSetFunctionDomainError(SNES); 152 PETSC_EXTERN PetscErrorCode SNESGetFunctionDomainError(SNES, PetscBool *); 153 154 /*E 155 SNESConvergedReason - reason a SNES method was said to 156 have converged or diverged 157 158 Level: beginner 159 160 The two most common reasons for divergence are 161 $ 1) an incorrectly coded or computed Jacobian or 162 $ 2) failure or lack of convergence in the linear system (in this case we recommend 163 $ testing with -pc_type lu to eliminate the linear solver as the cause of the problem). 164 165 Diverged Reasons: 166 . SNES_DIVERGED_LOCAL_MIN - this can only occur when using the line-search variant of SNES. 167 The line search wants to minimize Q(alpha) = 1/2 || F(x + alpha s) ||^2_2 this occurs 168 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 169 you get Q'(alpha) = -F(x)^T F'(x)^(-1)^T F'(x+alpha s)F(x+alpha s); when alpha = 0 170 Q'(0) = - ||F(x)||^2_2 which is always NEGATIVE if F'(x) is invertible. This means the Newton 171 direction is a descent direction and the line search should succeed if alpha is small enough. 172 173 If F'(x) is NOT invertible AND F'(x)^T F(x) = 0 then Q'(0) = 0 and the Newton direction 174 is NOT a descent direction so the line search will fail. All one can do at this point 175 is change the initial guess and try again. 176 177 An alternative explanation: Newton's method can be regarded as replacing the function with 178 its linear approximation and minimizing the 2-norm of that. That is F(x+s) approx F(x) + F'(x)s 179 so we minimize || F(x) + F'(x) s ||^2_2; do this using Least Squares. If F'(x) is invertible then 180 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 181 exists a nontrival (that is F'(x)s != 0) solution to the equation and this direction is 182 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) 183 = - (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)) != 0 184 and F'(x)^T F'(x) has no negative eigenvalues Q'(0) < 0 so s is a descent direction and the line 185 search should succeed for small enough alpha. 186 187 Note that this RARELY happens in practice. Far more likely the linear system is not being solved 188 (well enough?) or the Jacobian is wrong. 189 190 SNES_DIVERGED_MAX_IT means that the solver reached the maximum number of iterations without satisfying any 191 convergence criteria. SNES_CONVERGED_ITS means that SNESSkipConverged() was chosen as the convergence test; 192 thus the usual convergence criteria have not been checked and may or may not be satisfied. 193 194 Developer Notes: this must match finclude/petscsnes.h 195 196 The string versions of these are in SNESConvergedReason, if you change any value here you must 197 also adjust that array. 198 199 Each reason has its own manual page. 200 201 .seealso: SNESSolve(), SNESGetConvergedReason(), KSPConvergedReason, SNESSetConvergenceTest() 202 E*/ 203 typedef enum {/* converged */ 204 SNES_CONVERGED_FNORM_ABS = 2, /* ||F|| < atol */ 205 SNES_CONVERGED_FNORM_RELATIVE = 3, /* ||F|| < rtol*||F_initial|| */ 206 SNES_CONVERGED_SNORM_RELATIVE = 4, /* Newton computed step size small; || delta x || < stol || x ||*/ 207 SNES_CONVERGED_ITS = 5, /* maximum iterations reached */ 208 SNES_CONVERGED_TR_DELTA = 7, 209 /* diverged */ 210 SNES_DIVERGED_FUNCTION_DOMAIN = -1, /* the new x location passed the function is not in the domain of F */ 211 SNES_DIVERGED_FUNCTION_COUNT = -2, 212 SNES_DIVERGED_LINEAR_SOLVE = -3, /* the linear solve failed */ 213 SNES_DIVERGED_FNORM_NAN = -4, 214 SNES_DIVERGED_MAX_IT = -5, 215 SNES_DIVERGED_LINE_SEARCH = -6, /* the line search failed */ 216 SNES_DIVERGED_INNER = -7, /* inner solve failed */ 217 SNES_DIVERGED_LOCAL_MIN = -8, /* || J^T b || is small, implies converged to local minimum of F() */ 218 SNES_CONVERGED_ITERATING = 0} SNESConvergedReason; 219 PETSC_EXTERN const char *const*SNESConvergedReasons; 220 221 /*MC 222 SNES_CONVERGED_FNORM_ABS - 2-norm(F) <= abstol 223 224 Level: beginner 225 226 .seealso: SNESSolve(), SNESGetConvergedReason(), SNESConvergedReason, SNESSetTolerances() 227 228 M*/ 229 230 /*MC 231 SNES_CONVERGED_FNORM_RELATIVE - 2-norm(F) <= rtol*2-norm(F(x_0)) where x_0 is the initial guess 232 233 Level: beginner 234 235 .seealso: SNESSolve(), SNESGetConvergedReason(), SNESConvergedReason, SNESSetTolerances() 236 237 M*/ 238 239 /*MC 240 SNES_CONVERGED_SNORM_RELATIVE - The 2-norm of the last step <= stol * 2-norm(x) where x is the current 241 solution and stol is the 4th argument to SNESSetTolerances() 242 243 Options Database Keys: 244 -snes_stol <stol> - the step tolerance 245 246 Level: beginner 247 248 .seealso: SNESSolve(), SNESGetConvergedReason(), SNESConvergedReason, SNESSetTolerances() 249 250 M*/ 251 252 /*MC 253 SNES_DIVERGED_FUNCTION_COUNT - The user provided function has been called more times then the final 254 argument to SNESSetTolerances() 255 256 Level: beginner 257 258 .seealso: SNESSolve(), SNESGetConvergedReason(), SNESConvergedReason, SNESSetTolerances() 259 260 M*/ 261 262 /*MC 263 SNES_DIVERGED_FNORM_NAN - the 2-norm of the current function evaluation is not-a-number (NaN), this 264 is usually caused by a division of 0 by 0. 265 266 Level: beginner 267 268 .seealso: SNESSolve(), SNESGetConvergedReason(), SNESConvergedReason, SNESSetTolerances() 269 270 M*/ 271 272 /*MC 273 SNES_DIVERGED_MAX_IT - SNESSolve() has reached the maximum number of iterations requested 274 275 Level: beginner 276 277 .seealso: SNESSolve(), SNESGetConvergedReason(), SNESConvergedReason, SNESSetTolerances() 278 279 M*/ 280 281 /*MC 282 SNES_DIVERGED_LINE_SEARCH - The line search has failed. This only occurs for a SNES solvers that use a line search 283 284 Level: beginner 285 286 .seealso: SNESSolve(), SNESGetConvergedReason(), SNESConvergedReason, SNESSetTolerances(), SNESLineSearch 287 288 M*/ 289 290 /*MC 291 SNES_DIVERGED_LOCAL_MIN - the algorithm seems to have stagnated at a local minimum that is not zero. 292 See the manual page for SNESConvergedReason for more details 293 294 Level: beginner 295 296 .seealso: SNESSolve(), SNESGetConvergedReason(), SNESConvergedReason, SNESSetTolerances() 297 298 M*/ 299 300 /*MC 301 SNES_CONERGED_ITERATING - this only occurs if SNESGetConvergedReason() is called during the SNESSolve() 302 303 Level: beginner 304 305 .seealso: SNESSolve(), SNESGetConvergedReason(), SNESConvergedReason, SNESSetTolerances() 306 307 M*/ 308 309 PETSC_EXTERN PetscErrorCode SNESSetConvergenceTest(SNES,PetscErrorCode (*)(SNES,PetscInt,PetscReal,PetscReal,PetscReal,SNESConvergedReason*,void*),void*,PetscErrorCode (*)(void*)); 310 PETSC_EXTERN PetscErrorCode SNESConvergedDefault(SNES,PetscInt,PetscReal,PetscReal,PetscReal,SNESConvergedReason*,void*); 311 PETSC_EXTERN PetscErrorCode SNESSkipConverged(SNES,PetscInt,PetscReal,PetscReal,PetscReal,SNESConvergedReason*,void*); 312 PETSC_EXTERN PetscErrorCode SNESGetConvergedReason(SNES,SNESConvergedReason*); 313 314 PETSC_EXTERN PetscErrorCode SNESDMMeshComputeFunction(SNES,Vec,Vec,void*); 315 PETSC_EXTERN PetscErrorCode SNESDMMeshComputeJacobian(SNES,Vec,Mat*,Mat*,MatStructure*,void*); 316 317 /* --------- Solving systems of nonlinear equations --------------- */ 318 PETSC_EXTERN PetscErrorCode SNESSetFunction(SNES,Vec,PetscErrorCode (*SNESFunction)(SNES,Vec,Vec,void*),void*); 319 PETSC_EXTERN PetscErrorCode SNESGetFunction(SNES,Vec*,PetscErrorCode (**SNESFunction)(SNES,Vec,Vec,void*),void**); 320 PETSC_EXTERN PetscErrorCode SNESComputeFunction(SNES,Vec,Vec); 321 322 PETSC_EXTERN PetscErrorCode SNESSetJacobian(SNES,Mat,Mat,PetscErrorCode (*SNESJacobianFunction)(SNES,Vec,Mat*,Mat*,MatStructure*,void*),void*); 323 PETSC_EXTERN PetscErrorCode SNESGetJacobian(SNES,Mat*,Mat*,PetscErrorCode (**SNESJacobianFunction)(SNES,Vec,Mat*,Mat*,MatStructure*,void*),void**); 324 PETSC_EXTERN PetscErrorCode SNESObjectiveComputeFunctionDefaultFD(SNES,Vec,Vec,void*); 325 PETSC_EXTERN PetscErrorCode SNESComputeJacobianDefault(SNES,Vec,Mat*,Mat*,MatStructure*,void*); 326 PETSC_EXTERN PetscErrorCode SNESComputeJacobianDefaultColor(SNES,Vec,Mat*,Mat*,MatStructure*,void*); 327 PETSC_EXTERN PetscErrorCode SNESSetComputeInitialGuess(SNES,PetscErrorCode (*)(SNES,Vec,void*),void*); 328 PETSC_EXTERN PetscErrorCode SNESSetPicard(SNES,Vec,PetscErrorCode (*SNESFunction)(SNES,Vec,Vec,void*),Mat,Mat,PetscErrorCode (*SNESJacobianFunction)(SNES,Vec,Mat*,Mat*,MatStructure*,void*),void*); 329 PETSC_EXTERN PetscErrorCode SNESGetPicard(SNES,Vec*,PetscErrorCode (**SNESFunction)(SNES,Vec,Vec,void*),Mat*,Mat*,PetscErrorCode (**SNESJacobianFunction)(SNES,Vec,Mat*,Mat*,MatStructure*,void*),void**); 330 PETSC_EXTERN PetscErrorCode SNESSetInitialFunction(SNES,Vec); 331 PETSC_EXTERN PetscErrorCode SNESSetInitialFunctionNorm(SNES,PetscReal); 332 333 PETSC_EXTERN PetscErrorCode SNESSetObjective(SNES,PetscErrorCode (*SNESObjectiveFunction)(SNES,Vec,PetscReal *,void*),void*); 334 PETSC_EXTERN PetscErrorCode SNESGetObjective(SNES,PetscErrorCode (**SNESObjectiveFunction)(SNES,Vec,PetscReal *,void*),void**); 335 PETSC_EXTERN PetscErrorCode SNESComputeObjective(SNES,Vec,PetscReal *); 336 337 /*E 338 SNESNormSchedule - Frequency with which the norm is computed 339 340 Level: advanced 341 342 Support for these is highly dependent on the solver. 343 344 Notes: 345 This is primarily used to turn off extra norm and function computation 346 when the solvers are composed. 347 348 .seealso: SNESSolve(), SNESGetConvergedReason(), KSPSetNormType(), 349 KSPSetConvergenceTest(), KSPSetPCSide() 350 E*/ 351 352 typedef enum {SNES_NORM_DEFAULT = -1, 353 SNES_NORM_NONE = 0, 354 SNES_NORM_ALWAYS = 1, 355 SNES_NORM_INITIAL_ONLY = 2, 356 SNES_NORM_FINAL_ONLY = 3, 357 SNES_NORM_INITIAL_FINAL_ONLY = 4} SNESNormSchedule; 358 PETSC_EXTERN const char *const*const SNESNormSchedules; 359 /*MC 360 SNES_NORM_NONE - Don't compute function and its L2 norm. 361 362 Level: advanced 363 364 Notes: 365 This is most useful for stationary solvers with a fixed number of iterations used as smoothers. 366 367 .seealso: SNESNormSchedule, SNESSetNormSchedule(), SNES_NORM_DEFAULT 368 M*/ 369 370 /*MC 371 SNES_NORM_ALWAYS - Compute the function and its L2 norm at each iteration. 372 373 Level: advanced 374 375 Notes: 376 Most solvers will use this no matter what norm type is passed to them. 377 378 .seealso: SNESNormSchedule, SNESSetNormSchedule(), SNES_NORM_NONE 379 M*/ 380 381 /*MC 382 SNES_NORM_INITIAL_ONLY - Compute the function and its L2 at iteration 0, but do not update it. 383 384 Level: advanced 385 386 Notes: 387 This method is useful in composed methods, when a true solution might actually be found before SNESSolve() is called. 388 This option enables the solve to abort on the zeroth iteration if this is the case. 389 390 For solvers that require the computation of the L2 norm of the function as part of the method, this merely cancels 391 the norm computation at the last iteration (if possible). 392 393 .seealso: SNESNormSchedule, SNESSetNormSchedule(), SNES_NORM_FINAL_ONLY, SNES_NORM_INITIAL_FINAL_ONLY 394 M*/ 395 396 /*MC 397 SNES_NORM_FINAL_ONLY - Compute the function and its L2 norm on only the final iteration. 398 399 Level: advanced 400 401 Notes: 402 For solvers that require the computation of the L2 norm of the function as part of the method, behaves 403 exactly as SNES_NORM_DEFAULT. This method is useful when the function is gotten after SNESSolve and 404 used in subsequent computation for methods that do not need the norm computed during the rest of the 405 solution procedure. 406 407 .seealso: SNESNormSchedule, SNESSetNormSchedule(), SNES_NORM_INITIAL_ONLY, SNES_NORM_INITIAL_FINAL_ONLY 408 M*/ 409 410 /*MC 411 SNES_NORM_INITIAL_FINAL_ONLY - Compute the function and its L2 norm on only the initial and final iterations. 412 413 Level: advanced 414 415 Notes: 416 This method combines the benefits of SNES_NORM_INITIAL_ONLY and SNES_NORM_FINAL_ONLY. 417 418 .seealso: SNESNormSchedule, SNESSetNormSchedule(), SNES_NORM_SNES_NORM_INITIAL_ONLY, SNES_NORM_FINAL_ONLY 419 M*/ 420 421 422 PETSC_EXTERN PetscErrorCode SNESSetNormSchedule(SNES,SNESNormSchedule); 423 PETSC_EXTERN PetscErrorCode SNESGetNormSchedule(SNES,SNESNormSchedule*); 424 425 /*E 426 SNESFunctionType - Type of function computed 427 428 Level: advanced 429 430 Support for these is highly dependent on the solver. 431 432 .seealso: SNESSolve(), SNESGetConvergedReason(), KSPSetNormType(), 433 KSPSetConvergenceTest(), KSPSetPCSide() 434 E*/ 435 typedef enum {SNES_FUNCTION_DEFAULT = -1, 436 SNES_FUNCTION_UNPRECONDITIONED = 0, 437 SNES_FUNCTION_PRECONDITIONED = 1} SNESFunctionType; 438 PETSC_EXTERN const char *const*const SNESFunctionTypes; 439 440 PETSC_EXTERN PetscErrorCode SNESSetFunctionType(SNES,SNESFunctionType); 441 PETSC_EXTERN PetscErrorCode SNESGetFunctionType(SNES,SNESFunctionType*); 442 443 PETSC_EXTERN PetscErrorCode SNESSetGS(SNES,PetscErrorCode (*SNESGSFunction)(SNES,Vec,Vec,void*),void*); 444 PETSC_EXTERN PetscErrorCode SNESGetGS(SNES,PetscErrorCode (**SNESGSFunction)(SNES,Vec,Vec,void*),void**); 445 PETSC_EXTERN PetscErrorCode SNESSetUseGS(SNES,PetscBool); 446 PETSC_EXTERN PetscErrorCode SNESGetUseGS(SNES,PetscBool *); 447 PETSC_EXTERN PetscErrorCode SNESComputeGS(SNES,Vec,Vec); 448 449 PETSC_EXTERN PetscErrorCode SNESGSSetSweeps(SNES,PetscInt); 450 PETSC_EXTERN PetscErrorCode SNESGSGetSweeps(SNES,PetscInt *); 451 PETSC_EXTERN PetscErrorCode SNESGSSetTolerances(SNES,PetscReal,PetscReal,PetscReal,PetscInt); 452 PETSC_EXTERN PetscErrorCode SNESGSGetTolerances(SNES,PetscReal*,PetscReal*,PetscReal*,PetscInt*); 453 454 PETSC_EXTERN PetscErrorCode SNESUpdateCheckJacobian(SNES,PetscInt); 455 456 PETSC_EXTERN PetscErrorCode SNESShellGetContext(SNES,void**); 457 PETSC_EXTERN PetscErrorCode SNESShellSetContext(SNES,void*); 458 PETSC_EXTERN PetscErrorCode SNESShellSetSolve(SNES,PetscErrorCode (*)(SNES,Vec)); 459 460 /* --------- Routines specifically for line search methods --------------- */ 461 462 typedef struct _p_LineSearch* SNESLineSearch; 463 464 /*S 465 SNESLineSearch - Abstract PETSc object that manages line-search operations 466 467 Level: beginner 468 469 Concepts: nonlinear solvers, line search 470 471 .seealso: SNESLineSearchCreate(), SNESLineSearchSetType(), SNES 472 S*/ 473 474 /*J 475 SNESLineSearchType - String with the name of a PETSc line search method 476 477 Level: beginner 478 479 .seealso: SNESLineSearchSetType(), SNES 480 J*/ 481 482 typedef const char* SNESLineSearchType; 483 #define SNESLINESEARCHBT "bt" 484 #define SNESLINESEARCHBASIC "basic" 485 #define SNESLINESEARCHL2 "l2" 486 #define SNESLINESEARCHCP "cp" 487 #define SNESLINESEARCHSHELL "shell" 488 489 PETSC_EXTERN PetscBool SNESRegisterAllCalled; 490 PETSC_EXTERN PetscFunctionList SNESList; 491 PETSC_EXTERN PetscClassId SNESLINESEARCH_CLASSID; 492 PETSC_EXTERN PetscBool SNESLineSearchRegisterAllCalled; 493 PETSC_EXTERN PetscFunctionList SNESLineSearchList; 494 PETSC_EXTERN PetscLogEvent SNESLineSearch_Apply; 495 496 #define SNES_LINESEARCH_ORDER_LINEAR 1 497 #define SNES_LINESEARCH_ORDER_QUADRATIC 2 498 #define SNES_LINESEARCH_ORDER_CUBIC 3 499 500 PETSC_EXTERN_TYPEDEF typedef PetscErrorCode (*SNESLineSearchVIProjectFunc)(SNES,Vec); 501 PETSC_EXTERN_TYPEDEF typedef PetscErrorCode (*SNESLineSearchVINormFunc)(SNES,Vec,Vec,PetscReal *); 502 PETSC_EXTERN_TYPEDEF typedef PetscErrorCode (*SNESLineSearchApplyFunc)(SNESLineSearch); 503 PETSC_EXTERN_TYPEDEF typedef PetscErrorCode (*SNESLineSearchUserFunc)(SNESLineSearch, void *); 504 505 PETSC_EXTERN PetscErrorCode SNESLineSearchCreate(MPI_Comm, SNESLineSearch*); 506 PETSC_EXTERN PetscErrorCode SNESLineSearchReset(SNESLineSearch); 507 PETSC_EXTERN PetscErrorCode SNESLineSearchView(SNESLineSearch,PetscViewer); 508 PETSC_EXTERN PetscErrorCode SNESLineSearchDestroy(SNESLineSearch *); 509 PETSC_EXTERN PetscErrorCode SNESLineSearchSetType(SNESLineSearch, SNESLineSearchType); 510 PETSC_EXTERN PetscErrorCode SNESLineSearchSetFromOptions(SNESLineSearch); 511 PETSC_EXTERN PetscErrorCode SNESLineSearchSetUp(SNESLineSearch); 512 PETSC_EXTERN PetscErrorCode SNESLineSearchApply(SNESLineSearch, Vec, Vec, PetscReal *, Vec); 513 PETSC_EXTERN PetscErrorCode SNESLineSearchPreCheck(SNESLineSearch,Vec,Vec,PetscBool *); 514 PETSC_EXTERN PetscErrorCode SNESLineSearchPostCheck(SNESLineSearch,Vec,Vec,Vec,PetscBool *,PetscBool *); 515 PETSC_EXTERN PetscErrorCode SNESLineSearchSetWorkVecs(SNESLineSearch, PetscInt); 516 517 /* set the functions for precheck and postcheck */ 518 519 PETSC_EXTERN PetscErrorCode SNESLineSearchSetPreCheck(SNESLineSearch, PetscErrorCode (*SNESLineSearchPreCheckFunction)(SNESLineSearch,Vec,Vec,PetscBool*,void*), void *ctx); 520 PETSC_EXTERN PetscErrorCode SNESLineSearchSetPostCheck(SNESLineSearch, PetscErrorCode (*SNESLineSearchPostCheckFunction)(SNESLineSearch,Vec,Vec,Vec,PetscBool *,PetscBool *,void*), void *ctx); 521 522 PETSC_EXTERN PetscErrorCode SNESLineSearchGetPreCheck(SNESLineSearch, PetscErrorCode (**SNESLineSearchPreCheckFunction)(SNESLineSearch,Vec,Vec,PetscBool*,void*), void **ctx); 523 PETSC_EXTERN PetscErrorCode SNESLineSearchGetPostCheck(SNESLineSearch, PetscErrorCode (**SNESLineSearchPostCheckFunction)(SNESLineSearch,Vec,Vec,Vec,PetscBool *,PetscBool *,void*), void **ctx); 524 525 /* set the functions for VI-specific line search operations */ 526 527 PETSC_EXTERN PetscErrorCode SNESLineSearchSetVIFunctions(SNESLineSearch, SNESLineSearchVIProjectFunc, SNESLineSearchVINormFunc); 528 PETSC_EXTERN PetscErrorCode SNESLineSearchGetVIFunctions(SNESLineSearch, SNESLineSearchVIProjectFunc*, SNESLineSearchVINormFunc*); 529 530 /* pointers to the associated SNES in order to be able to get the function evaluation out */ 531 PETSC_EXTERN PetscErrorCode SNESLineSearchSetSNES(SNESLineSearch,SNES); 532 PETSC_EXTERN PetscErrorCode SNESLineSearchGetSNES(SNESLineSearch,SNES*); 533 534 /* set and get the parameters and vectors */ 535 PETSC_EXTERN PetscErrorCode SNESLineSearchGetTolerances(SNESLineSearch,PetscReal*,PetscReal*,PetscReal*,PetscReal*,PetscReal*,PetscInt*); 536 PETSC_EXTERN PetscErrorCode SNESLineSearchSetTolerances(SNESLineSearch,PetscReal,PetscReal,PetscReal,PetscReal,PetscReal,PetscInt); 537 538 PETSC_EXTERN PetscErrorCode SNESLineSearchPreCheckPicard(SNESLineSearch,Vec,Vec,PetscBool*,void*); 539 540 PETSC_EXTERN PetscErrorCode SNESLineSearchGetLambda(SNESLineSearch,PetscReal*); 541 PETSC_EXTERN PetscErrorCode SNESLineSearchSetLambda(SNESLineSearch,PetscReal); 542 543 PETSC_EXTERN PetscErrorCode SNESLineSearchGetDamping(SNESLineSearch,PetscReal*); 544 PETSC_EXTERN PetscErrorCode SNESLineSearchSetDamping(SNESLineSearch,PetscReal); 545 546 PETSC_EXTERN PetscErrorCode SNESLineSearchGetOrder(SNESLineSearch,PetscInt *order); 547 PETSC_EXTERN PetscErrorCode SNESLineSearchSetOrder(SNESLineSearch,PetscInt order); 548 549 PETSC_EXTERN PetscErrorCode SNESLineSearchGetSuccess(SNESLineSearch, PetscBool*); 550 PETSC_EXTERN PetscErrorCode SNESLineSearchSetSuccess(SNESLineSearch, PetscBool); 551 552 PETSC_EXTERN PetscErrorCode SNESLineSearchGetVecs(SNESLineSearch,Vec*,Vec*,Vec*,Vec*,Vec*); 553 PETSC_EXTERN PetscErrorCode SNESLineSearchSetVecs(SNESLineSearch,Vec,Vec,Vec,Vec,Vec); 554 555 PETSC_EXTERN PetscErrorCode SNESLineSearchGetNorms(SNESLineSearch, PetscReal *, PetscReal *, PetscReal *); 556 PETSC_EXTERN PetscErrorCode SNESLineSearchSetNorms(SNESLineSearch, PetscReal, PetscReal, PetscReal); 557 PETSC_EXTERN PetscErrorCode SNESLineSearchComputeNorms(SNESLineSearch); 558 PETSC_EXTERN PetscErrorCode SNESLineSearchSetComputeNorms(SNESLineSearch, PetscBool); 559 560 PETSC_EXTERN PetscErrorCode SNESLineSearchSetMonitor(SNESLineSearch, PetscBool); 561 PETSC_EXTERN PetscErrorCode SNESLineSearchGetMonitor(SNESLineSearch, PetscViewer*); 562 563 PETSC_EXTERN PetscErrorCode SNESLineSearchAppendOptionsPrefix(SNESLineSearch, const char prefix[]); 564 PETSC_EXTERN PetscErrorCode SNESLineSearchGetOptionsPrefix(SNESLineSearch, const char *prefix[]); 565 566 567 /* Shell interface functions */ 568 PETSC_EXTERN PetscErrorCode SNESLineSearchShellSetUserFunc(SNESLineSearch,SNESLineSearchUserFunc,void*); 569 PETSC_EXTERN PetscErrorCode SNESLineSearchShellGetUserFunc(SNESLineSearch,SNESLineSearchUserFunc*,void**); 570 571 /* BT interface functions */ 572 PETSC_EXTERN PetscErrorCode SNESLineSearchBTSetAlpha(SNESLineSearch, PetscReal); 573 PETSC_EXTERN PetscErrorCode SNESLineSearchBTGetAlpha(SNESLineSearch, PetscReal*); 574 575 /*register line search types */ 576 PETSC_EXTERN PetscErrorCode SNESLineSearchRegister(const char[],PetscErrorCode(*)(SNESLineSearch)); 577 PETSC_EXTERN PetscErrorCode SNESLineSearchRegisterAll(void); 578 579 /* Routines for VI solver */ 580 PETSC_EXTERN PetscErrorCode SNESVISetVariableBounds(SNES,Vec,Vec); 581 PETSC_EXTERN PetscErrorCode SNESVISetComputeVariableBounds(SNES, PetscErrorCode (*)(SNES,Vec,Vec)); 582 PETSC_EXTERN PetscErrorCode SNESVIGetInactiveSet(SNES,IS*); 583 PETSC_EXTERN PetscErrorCode SNESVIGetActiveSetIS(SNES,Vec,Vec,IS*); 584 PETSC_EXTERN PetscErrorCode SNESVIComputeInactiveSetFnorm(SNES,Vec,Vec,PetscReal*); 585 PETSC_EXTERN PetscErrorCode SNESVISetRedundancyCheck(SNES,PetscErrorCode(*)(SNES,IS,IS*,void*),void*); 586 #define SNES_VI_INF 1.0e20 587 #define SNES_VI_NINF -1.0e20 588 589 PETSC_EXTERN PetscErrorCode SNESTestLocalMin(SNES); 590 591 /* Should this routine be private? */ 592 PETSC_EXTERN PetscErrorCode SNESComputeJacobian(SNES,Vec,Mat*,Mat*,MatStructure*); 593 594 PETSC_EXTERN PetscErrorCode SNESSetDM(SNES,DM); 595 PETSC_EXTERN PetscErrorCode SNESGetDM(SNES,DM*); 596 PETSC_EXTERN PetscErrorCode SNESSetPC(SNES,SNES); 597 PETSC_EXTERN PetscErrorCode SNESGetPC(SNES,SNES*); 598 PETSC_EXTERN PetscErrorCode SNESApplyPC(SNES,Vec,Vec,PetscReal*,Vec); 599 PETSC_EXTERN PetscErrorCode SNESSetPCSide(SNES,PCSide); 600 PETSC_EXTERN PetscErrorCode SNESGetPCSide(SNES,PCSide*); 601 PETSC_EXTERN PetscErrorCode SNESSetLineSearch(SNES,SNESLineSearch); 602 PETSC_EXTERN PetscErrorCode SNESGetLineSearch(SNES,SNESLineSearch*); 603 PETSC_EXTERN PetscErrorCode SNESRestrictHookAdd(SNES,PetscErrorCode (*)(SNES,SNES,void*),void*); 604 PETSC_EXTERN PetscErrorCode SNESRestrictHooksRun(SNES,SNES); 605 606 PETSC_DEPRECATED("Use SNESGetLineSearch()") PETSC_STATIC_INLINE PetscErrorCode SNESGetSNESLineSearch(SNES snes,SNESLineSearch *ls) {return SNESGetLineSearch(snes,ls);} 607 PETSC_DEPRECATED("Use SNESSetLineSearch()") PETSC_STATIC_INLINE PetscErrorCode SNESSetSNESLineSearch(SNES snes,SNESLineSearch ls) {return SNESSetLineSearch(snes,ls);} 608 609 PETSC_EXTERN PetscErrorCode SNESSetUpMatrices(SNES); 610 PETSC_EXTERN PetscErrorCode DMSNESSetFunction(DM,PetscErrorCode(*SNESFunction)(SNES,Vec,Vec,void*),void*); 611 PETSC_EXTERN PetscErrorCode DMSNESGetFunction(DM,PetscErrorCode(**SNESSetFunction)(SNES,Vec,Vec,void*),void**); 612 PETSC_EXTERN PetscErrorCode DMSNESSetGS(DM,PetscErrorCode(*SNESGSFunction)(SNES,Vec,Vec,void*),void*); 613 PETSC_EXTERN PetscErrorCode DMSNESGetGS(DM,PetscErrorCode(**SNESGSFunction)(SNES,Vec,Vec,void*),void**); 614 PETSC_EXTERN PetscErrorCode DMSNESSetJacobian(DM,PetscErrorCode(*SNESJacobianFunction)(SNES,Vec,Mat*,Mat*,MatStructure*,void*),void*); 615 PETSC_EXTERN PetscErrorCode DMSNESGetJacobian(DM,PetscErrorCode(**SNESJacobianFunction)(SNES,Vec,Mat*,Mat*,MatStructure*,void*),void**); 616 PETSC_EXTERN PetscErrorCode DMSNESSetPicard(DM,PetscErrorCode(*SNESFunction)(SNES,Vec,Vec,void*),PetscErrorCode(*SNESJacobianFunction)(SNES,Vec,Mat*,Mat*,MatStructure*,void*),void*); 617 PETSC_EXTERN PetscErrorCode DMSNESGetPicard(DM,PetscErrorCode(**SNESFunction)(SNES,Vec,Vec,void*),PetscErrorCode(**SNESJacobianFunction)(SNES,Vec,Mat*,Mat*,MatStructure*,void*),void**); 618 PETSC_EXTERN PetscErrorCode DMSNESSetObjective(DM,PetscErrorCode (*SNESObjectiveFunction)(SNES,Vec,PetscReal *,void*),void*); 619 PETSC_EXTERN PetscErrorCode DMSNESGetObjective(DM,PetscErrorCode (**SNESObjectiveFunction)(SNES,Vec,PetscReal *,void*),void**); 620 621 PETSC_EXTERN_TYPEDEF typedef PetscErrorCode (*DMDASNESFunction)(DMDALocalInfo*,void*,void*,void*); 622 PETSC_EXTERN_TYPEDEF typedef PetscErrorCode (*DMDASNESJacobian)(DMDALocalInfo*,void*,Mat,Mat,MatStructure*,void*); 623 PETSC_EXTERN_TYPEDEF typedef PetscErrorCode (*DMDASNESObjective)(DMDALocalInfo*,void*,PetscReal*,void*); 624 625 PETSC_EXTERN PetscErrorCode DMDASNESSetFunctionLocal(DM,InsertMode,DMDASNESFunction,void*); 626 PETSC_EXTERN PetscErrorCode DMDASNESSetJacobianLocal(DM,DMDASNESJacobian,void*); 627 PETSC_EXTERN PetscErrorCode DMDASNESSetObjectiveLocal(DM,DMDASNESObjective,void*); 628 PETSC_EXTERN PetscErrorCode DMDASNESSetPicardLocal(DM,InsertMode,PetscErrorCode (*)(DMDALocalInfo*,void*,void*,void*),PetscErrorCode (*)(DMDALocalInfo*,void*,Mat,Mat,MatStructure*,void*),void*); 629 630 PETSC_EXTERN PetscErrorCode DMSNESSetFunctionLocal(DM,PetscErrorCode (*)(DM,Vec,Vec,void*),void*); 631 PETSC_EXTERN PetscErrorCode DMSNESSetJacobianLocal(DM,PetscErrorCode (*)(DM,Vec,Mat,Mat,MatStructure*,void*),void*); 632 633 /* Routines for Multiblock solver */ 634 PETSC_EXTERN PetscErrorCode SNESMultiblockSetFields(SNES, const char [], PetscInt, const PetscInt *); 635 PETSC_EXTERN PetscErrorCode SNESMultiblockSetIS(SNES, const char [], IS); 636 PETSC_EXTERN PetscErrorCode SNESMultiblockSetBlockSize(SNES, PetscInt); 637 PETSC_EXTERN PetscErrorCode SNESMultiblockSetType(SNES, PCCompositeType); 638 639 /*J 640 SNESMSType - String with the name of a PETSc SNESMS method. 641 642 Level: intermediate 643 644 .seealso: SNESMSSetType(), SNES 645 J*/ 646 typedef const char* SNESMSType; 647 #define SNESMSM62 "m62" 648 #define SNESMSEULER "euler" 649 #define SNESMSJAMESON83 "jameson83" 650 #define SNESMSVLTP21 "vltp21" 651 #define SNESMSVLTP31 "vltp31" 652 #define SNESMSVLTP41 "vltp41" 653 #define SNESMSVLTP51 "vltp51" 654 #define SNESMSVLTP61 "vltp61" 655 656 PETSC_EXTERN PetscErrorCode SNESMSRegister(SNESMSType,PetscInt,PetscInt,PetscReal,const PetscReal[],const PetscReal[],const PetscReal[]); 657 PETSC_EXTERN PetscErrorCode SNESMSSetType(SNES,SNESMSType); 658 PETSC_EXTERN PetscErrorCode SNESMSFinalizePackage(void); 659 PETSC_EXTERN PetscErrorCode SNESMSInitializePackage(void); 660 PETSC_EXTERN PetscErrorCode SNESMSRegisterDestroy(void); 661 PETSC_EXTERN PetscErrorCode SNESMSRegisterAll(void); 662 663 /* routines for NGMRES solver */ 664 665 typedef enum { 666 SNES_NGMRES_RESTART_NONE = 0, 667 SNES_NGMRES_RESTART_PERIODIC = 1, 668 SNES_NGMRES_RESTART_DIFFERENCE = 2} SNESNGMRESRestartType; 669 PETSC_EXTERN const char *const SNESNGMRESRestartTypes[]; 670 671 typedef enum { 672 SNES_NGMRES_SELECT_NONE = 0, 673 SNES_NGMRES_SELECT_DIFFERENCE = 1, 674 SNES_NGMRES_SELECT_LINESEARCH = 2} SNESNGMRESSelectType; 675 PETSC_EXTERN const char *const SNESNGMRESSelectTypes[]; 676 677 PETSC_EXTERN PetscErrorCode SNESNGMRESSetRestartType(SNES, SNESNGMRESRestartType); 678 PETSC_EXTERN PetscErrorCode SNESNGMRESSetSelectType(SNES, SNESNGMRESSelectType); 679 680 /* routines for NCG solver */ 681 682 typedef enum { 683 SNES_NCG_FR = 0, 684 SNES_NCG_PRP = 1, 685 SNES_NCG_HS = 2, 686 SNES_NCG_DY = 3, 687 SNES_NCG_CD = 4} SNESNCGType; 688 PETSC_EXTERN const char *const SNESNCGTypes[]; 689 690 PETSC_EXTERN PetscErrorCode SNESNCGSetType(SNES, SNESNCGType); 691 692 typedef enum {SNES_QN_SCALE_NONE = 0, 693 SNES_QN_SCALE_SHANNO = 1, 694 SNES_QN_SCALE_LINESEARCH = 2, 695 SNES_QN_SCALE_JACOBIAN = 3} SNESQNScaleType; 696 PETSC_EXTERN const char *const SNESQNScaleTypes[]; 697 typedef enum {SNES_QN_RESTART_NONE = 0, 698 SNES_QN_RESTART_POWELL = 1, 699 SNES_QN_RESTART_PERIODIC = 2} SNESQNRestartType; 700 PETSC_EXTERN const char *const SNESQNRestartTypes[]; 701 702 PETSC_EXTERN PetscErrorCode SNESQNSetScaleType(SNES, SNESQNScaleType); 703 PETSC_EXTERN PetscErrorCode SNESQNSetRestartType(SNES, SNESQNRestartType); 704 705 PETSC_EXTERN PetscErrorCode SNESNASMGetSubdomains(SNES,PetscInt*,SNES**,VecScatter**,VecScatter**,VecScatter**); 706 PETSC_EXTERN PetscErrorCode SNESNASMSetSubdomains(SNES,PetscInt,SNES*,VecScatter*,VecScatter*,VecScatter*); 707 PETSC_EXTERN PetscErrorCode SNESNASMSetDamping(SNES,PetscReal); 708 PETSC_EXTERN PetscErrorCode SNESNASMGetDamping(SNES,PetscReal*); 709 PETSC_EXTERN PetscErrorCode SNESNASMGetSubdomainVecs(SNES,PetscInt*,Vec**,Vec**,Vec**,Vec**); 710 PETSC_EXTERN PetscErrorCode SNESNASMSetComputeFinalJacobian(SNES,PetscBool); 711 712 #endif 713