class DenseMatrix implements Serializable {

    public DenseMatrix minus(DenseMatrix mat) {
        DenseMatrix r = this.clone();
        BLAS.axpy(-1.0, mat, r);
        return r;
    }

    public  DenseMatrix();
    public  DenseMatrix(int m, int n);
    public  DenseMatrix(int m, int n, double[] data);
    public  DenseMatrix(int m, int n, double[] data, boolean inRowMajor);
    public  DenseMatrix(double[][] data);

}