1 #include <../src/tao/bound/impls/bqnk/bqnk.h> 2 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_` 9 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") 15 16 Level: beginner 17 M*/ 18 PETSC_EXTERN PetscErrorCode TaoCreate_BQNKLS(Tao tao) 19 { 20 TAO_BNK *bnk; 21 TAO_BQNK *bqnk; 22 PetscErrorCode ierr; 23 24 PetscFunctionBegin; 25 ierr = TaoCreate_BQNK(tao);CHKERRQ(ierr); 26 bnk = (TAO_BNK*)tao->data; 27 bnk->update_type = BNK_UPDATE_STEP; 28 bqnk = (TAO_BQNK*)bnk->ctx; 29 bqnk->solve = TaoSolve_BNLS; 30 PetscFunctionReturn(0); 31 } 32