Searched refs:gkp1D_yk (Results 1 – 1 of 1) sorted by relevance
441 PetscReal gkp1_yk, gd_old, tau_bfgs, tau_dfp, gkp1D_yk, gtDg; in TaoBNCGStepDirectionUpdate() local735 PetscCall(VecDot(cg->yk, cg->g_work, &gkp1D_yk)); in TaoBNCGStepDirectionUpdate()742 beta = gkp1D_yk / dk_yk - step * gamma - tau_k; in TaoBNCGStepDirectionUpdate()747 if (gkp1D_yk / dk_yk < 0) gamma = -1.0 * gd / dk_yk; in TaoBNCGStepDirectionUpdate()