public function testCrossProductPropertyOfZero(array $A, array $_)
{
$A = new Vector($A);
$zero = new Vector(array_fill(0, $A->getN(), 0));
$Ax0 = $A->crossProduct($zero);
$this->assertEquals($zero, $Ax0);
$this->assertEquals($zero->getVector(), $Ax0->getVector());
}