@Test public void testDiagonalMatrix() {
DiagonalMatrix m=DiagonalMatrix.create(Vector.of(0,1,2));
assertEquals(0,m.upperBandwidth());
assertEquals(0,m.upperBandwidthLimit());
assertEquals(0,m.lowerBandwidth());
assertEquals(0,m.lowerBandwidthLimit());
}
@Test public void testBandLength() {
Matrix m=Matrix.create(3, 4);