Actual source code: lmvm.h
1: #ifndef __LMVM_H
3: #include <petscksp.h>
4: #include <petsc/private/matimpl.h>
5: #include <petsc/private/vecimpl.h>
7: /*
8: MATLMVM format - a base matrix-type that represents Limited-Memory
9: Variable Metric (LMVM) approximations of a Jacobian.
11: LMVM approximations can be symmetric, symmetric positive-definite,
12: rectangular, or otherwise square with no determinable properties.
13: Each derived LMVM type should automatically set its matrix properties
14: if its construction can guarantee symmetry (MAT_SYMMETRIC) or symmetric
15: positive-definiteness (MAT_SPD).
16: */
18: typedef struct _MatOps_LMVM *MatOps_LMVM;
19: struct _MatOps_LMVM {
20: PetscErrorCode (*update)(Mat, Vec, Vec);
21: PetscErrorCode (*allocate)(Mat, Vec, Vec);
22: PetscErrorCode (*reset)(Mat, PetscBool);
23: PetscErrorCode (*mult)(Mat, Vec, Vec);
24: PetscErrorCode (*copy)(Mat, Mat, MatStructure);
25: };
27: typedef struct {
28: /* Core data structures for stored updates */
29: PETSCHEADER(struct _MatOps_LMVM);
30: PetscBool allocated, prev_set;
31: PetscInt m_old, m, k, nupdates, nrejects, nresets;
32: Vec *S, *Y;
33: Vec Xprev, Fprev;
35: /* User-defined initial Jacobian tools */
36: PetscBool user_pc, user_ksp, user_scale;
37: PetscReal ksp_rtol, ksp_atol;
38: PetscInt ksp_max_it;
39: PetscReal J0scalar;
40: Vec J0diag;
41: Mat J0;
42: PC J0pc;
43: KSP J0ksp;
45: /* Data structures to support common Mat functions */
46: PetscReal shift;
48: /* Miscellenous parameters */
49: PetscBool square; /* flag for defining the LMVM approximation as a square matrix */
50: PetscReal eps; /* (default: PetscPowReal(PETSC_MACHINE_EPSILON, 2.0/3.0)) */
51: void *ctx; /* implementation specific context */
52: } Mat_LMVM;
54: /* Shared internal functions for LMVM matrices */
55: PETSC_INTERN PetscErrorCode MatUpdateKernel_LMVM(Mat, Vec, Vec);
56: PETSC_INTERN PetscErrorCode MatUpdate_LMVM(Mat, Vec, Vec);
57: PETSC_INTERN PetscErrorCode MatAllocate_LMVM(Mat, Vec, Vec);
58: PETSC_INTERN PetscErrorCode MatReset_LMVM(Mat, PetscBool);
60: /* LMVM implementations of core Mat functionality */
61: PETSC_INTERN PetscErrorCode MatSetFromOptions_LMVM(Mat, PetscOptionItems *PetscOptionsObject);
62: PETSC_INTERN PetscErrorCode MatSetUp_LMVM(Mat);
63: PETSC_INTERN PetscErrorCode MatView_LMVM(Mat, PetscViewer);
64: PETSC_INTERN PetscErrorCode MatDestroy_LMVM(Mat);
65: PETSC_INTERN PetscErrorCode MatCreate_LMVM(Mat);
67: /* Create functions for derived LMVM types
68: NOTE: MatCreateXYZ() declarations for subtypes live under petsctao.h */
69: PETSC_EXTERN PetscErrorCode MatCreate_LMVMDFP(Mat);
70: PETSC_EXTERN PetscErrorCode MatCreate_LMVMBFGS(Mat);
71: PETSC_EXTERN PetscErrorCode MatCreate_LMVMSR1(Mat);
72: PETSC_EXTERN PetscErrorCode MatCreate_LMVMBrdn(Mat);
73: PETSC_EXTERN PetscErrorCode MatCreate_LMVMBadBrdn(Mat);
74: PETSC_EXTERN PetscErrorCode MatCreate_LMVMSymBrdn(Mat);
75: PETSC_EXTERN PetscErrorCode MatCreate_LMVMSymBadBrdn(Mat);
76: PETSC_EXTERN PetscErrorCode MatCreate_LMVMDiagBrdn(Mat);
78: /* Solve functions for derived LMVM types (necessary only for DFP and BFGS for re-use under SymBrdn) */
79: PETSC_INTERN PetscErrorCode MatSolve_LMVMDFP(Mat, Vec, Vec);
80: PETSC_INTERN PetscErrorCode MatSolve_LMVMBFGS(Mat, Vec, Vec);
82: /* Mult functions for derived LMVM types (necessary only for DFP and BFGS for re-use under SymBrdn) */
83: PETSC_INTERN PetscErrorCode MatMult_LMVMDFP(Mat, Vec, Vec);
84: PETSC_INTERN PetscErrorCode MatMult_LMVMBFGS(Mat, Vec, Vec);
86: #endif