MathPHP\SetTheory\SetAxiomsTest::testAIntersectionAEqualsA PHP Метод

    public function testAIntersectionAEqualsA(Set $A)
    {
        $A∩A = $A->intersect($A);
        $this->assertEquals($A, $A∩A);
        $this->assertEquals($A->asArray(), $A∩A->asArray());
    }