public void printSymmetry(Matrix m) {
        IOGeneric.printResult("Symmetric? " + (isSymmetrical()? "Yes. " : "No. ")
                + "TopTriangular? " + (m.isUpTriangular()? "Yes. " : "No. ")
                + "DownTriangular? " + (m.isDownTriangular()? "Yes. " : "No. ")
            , "-");
    }