725 static PetscErrorCode ComputeError(DM dm, PetscErrorCode (**exactFuncs)(PetscInt, PetscReal, const …  in ComputeError()
733   PetscCall(DMProjectFunction(dm, 0.0, exactFuncs, exactCtxs, INSERT_ALL_VALUES, u));  in ComputeError()
736   PetscCall(DMComputeL2Diff(dm, 0.0, exactFuncs, exactCtxs, u, error));  in ComputeError()
744 …PetscErrorCode (*exactFuncs[1])(PetscInt dim, PetscReal time, const PetscReal x[], PetscInt Nf, Pe…  in CheckFunctions()  local
759       exactFuncs[0]    = rt0;  in CheckFunctions()
762       exactFuncs[0]    = constant;  in CheckFunctions()
768       exactFuncs[0]    = rt1;  in CheckFunctions()
771       exactFuncs[0]    = linear;  in CheckFunctions()
776     exactFuncs[0]    = quadratic;  in CheckFunctions()
780     exactFuncs[0]    = cubic;  in CheckFunctions()
786   PetscCall(ComputeError(dm, exactFuncs, exactFuncDers, exactCtxs, &error, &errorDer, user));  in CheckFunctions()
797 …PetscErrorCode (*exactFuncs[1])(PetscInt, PetscReal, const PetscReal x[], PetscInt, PetscScalar *u…  in CheckInterpolation()  local
828     exactFuncs[0]    = constant;  in CheckInterpolation()
832     exactFuncs[0]    = linear;  in CheckInterpolation()
836     exactFuncs[0]    = quadratic;  in CheckInterpolation()
840     exactFuncs[0]    = cubic;  in CheckInterpolation()
854   PetscCall(DMProjectFunction(idm, 0.0, exactFuncs, exactCtxs, INSERT_ALL_VALUES, iu));  in CheckInterpolation()
862   PetscCall(DMComputeL2Diff(fdm, 0.0, exactFuncs, exactCtxs, fu, &error));  in CheckInterpolation()
880 …PetscErrorCode (*exactFuncs[1])(PetscInt dim, PetscReal time, const PetscReal x[], PetscInt Nf, Pe…  in CheckConvergence()  local
901   PetscCall(ComputeError(odm, exactFuncs, exactFuncDers, exactCtxs, &errorOld, &errorDerOld, user));  in CheckConvergence()
907       PetscCall(ComputeError(rdm, exactFuncs, exactFuncDers, exactCtxs, &error, &errorDer, user));  in CheckConvergence()
925       PetscCall(ComputeError(cdm, exactFuncs, exactFuncDers, exactCtxs, &error, &errorDer, user));  in CheckConvergence()