tests symmranknminus_u with various sized input matrices concode_field_sep int N concode_elem_sep Random rand concode_field_sep void checkSymmRankNMinus_U concode_elem_sep void rankNUpdate concode_elem_sep void symmRankNMinus_L concode_elem_sep void checkRankNUpdate concode_elem_sep void checkSymmRankNMinus_L