Actual source code: bqnkls.c
petsc-3.13.6 2020-09-29
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      1:  #include <../src/tao/bound/impls/bqnk/bqnk.h>

      3: /*MC
      4:   TAOBQNKLS - Bounded Quasi-Newton-Krylov Line Search method for nonlinear minimization with
      5:               bound constraints. This method approximates the Hessian-vector product using a
      6:               limited-memory quasi-Newton formula, and iteratively inverts the Hessian with a
      7:               Krylov solver. The quasi-Newton matrix and its settings can be accessed via the
      8:               prefix `-tao_bqnk_`

     10:   Options Database Keys:
     11: + -tao_bqnk_max_cg_its - maximum number of bounded conjugate-gradient iterations taken in each Newton loop
     12: . -tao_bqnk_init_type - trust radius initialization method ("constant", "direction", "interpolation")
     13: . -tao_bqnk_update_type - trust radius update method ("step", "direction", "interpolation")
     14: - -tao_bqnk_as_type - active-set estimation method ("none", "bertsekas")

     16:   Level: beginner
     17: M*/
     18: PETSC_EXTERN PetscErrorCode TaoCreate_BQNKLS(Tao tao)
     19: {
     20:   TAO_BNK        *bnk;
     22:
     24:   TaoCreate_BQNK(tao);
     25:   tao->ops->solve = TaoSolve_BNLS;
     26:   bnk = (TAO_BNK*)tao->data;
     27:   bnk->update_type = BNK_UPDATE_STEP;
     28:   return(0);
     29: }