Actual source code: trimpl.h
petsc-3.10.5 2019-03-28
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      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: } SNES_NEWTONTR;

     25: #endif