Actual source code: trimpl.h
petsc-3.13.6 2020-09-29
2: /*
3: Context for a Newton trust region method for solving a system
4: of nonlinear equations
5: */
9: #include <petsc/private/snesimpl.h>
11: typedef struct {
12: /* ---- Parameters used by the trust region method ---- */
13: PetscReal mu; /* used to compute trust region parameter */
14: PetscReal eta; /* used to compute trust region parameter */
15: PetscReal delta; /* trust region parameter */
16: PetscReal delta0; /* used to initialize trust region parameter */
17: PetscReal delta1; /* used to compute trust region parameter */
18: PetscReal delta2; /* used to compute trust region parameter */
19: PetscReal delta3; /* used to compute trust region parameter */
20: PetscReal sigma; /* used to detemine termination */
21: PetscBool itflag; /* flag for convergence testing */
22: PetscReal rnorm0,ttol; /* used for KSP convergence test */
23: PetscErrorCode (*precheck)(SNES,Vec,Vec,PetscBool*,void*);
24: void *precheckctx;
25: PetscErrorCode (*postcheck)(SNES,Vec,Vec,Vec,PetscBool*,PetscBool*,void*);
26: void *postcheckctx;
27: } SNES_NEWTONTR;
29: #endif