if (m != mA) {
fail("mulAssign must return <this>");
}
final int offset = m.offset();
for (int row=offset; row<m.rows()+offset; row++) {
for (int col=offset; col<m.cols()+offset; col++) {
if (!Closeness.isClose(m.get(row, col), (col-offset+1)*2.5)) {
fail("mulAssign failed");
}
}