MathPHP\SetTheory\SetAxiomsTest::testADiffBDifferentFromBDiffAWhenNotEqual PHP Method

    public function testADiffBDifferentFromBDiffAWhenNotEqual(Set $A, Set $B)
    {
        $A∖B = $A->difference($B);
        $B∖A = $B->difference($A);
        $this->assertNotEquals($A∖B, $B∖A);
        $this->assertNotEquals($A∖B->asArray(), $B∖A->asArray());
    }