internal static extern SparseStatus mkl_sparse_s_svd(StringBuilder whichE, StringBuilder whichV, int[] pm, /* sparse_matrix_t */ IntPtr A, MatrixDescriptor descrA, int k0, ref int k, IntPtr E, IntPtr X, IntPtr XR, IntPtr res);
internal static extern SparseStatus mkl_sparse_d_gv(StringBuilder which, int[] pm, /* sparse_matrix_t */ IntPtr A, MatrixDescriptor descrA, /* sparse_matrix_t */ IntPtr B, MatrixDescriptor descrB, int k0, ref int k, IntPtr E, IntPtr X, IntPtr res);