[numerics] small doc update
@@ -87,7 +87,8 @@ extern "C"
CSparseMatrix* csc; /**< csc matrix */
CSparseMatrix* trans_csc; /**< transpose of a csc matrix (used by CSparse) */
CSparseMatrix* csr; /**< csr matrix, only supported with mkl */
- csi* diag_indx; /**< indices for the diagonal terms */
+ csi* diag_indx; /**< indices for the diagonal terms.
+ Very useful for the proximal perturbation */
unsigned origin; /**< original format of the matrix */
};
