Searched refs:y_k (Results 1 – 3 of 3) sorted by relevance
136 Vec s_k, y_k; in MatUpdateKernel_LMVM() local143 PetscCall(LMBasisGetNextVec(lmvm->basis[LMBASIS_Y], &y_k)); in MatUpdateKernel_LMVM()144 PetscCall(VecCopy(Y, y_k)); in MatUpdateKernel_LMVM()145 PetscCall(LMBasisRestoreNextVec(lmvm->basis[LMBASIS_Y], &y_k)); in MatUpdateKernel_LMVM()
599 $y_k = f(x_k) - f(x_{k-1})$, where $k$ is the index for637 a subset of update vectors $s_k$ and $y_k$, and641 the well-known $y_k^T s_k / y_k^T y_k$ scalar initialization).
1882 contribution of $y_k \equiv \nabla f(x_k) - \nabla f(x_{k-1})$ in2166 Given the current iterate $(u_k, v_k, y_k)$, the linearly