/** * Axiom: L(n,n) = 1 * Lah number identity when n = n * * @dataProvider dataProivderForLahNumberIdentities */ public function testLahNumberIdentityNNEqualsOne(int $n) { $L⟮n、n⟯ = Combinatorics::lahNumber($n, $n); $this->assertEquals(1, $L⟮n、n⟯); }
public function testLahNumberExceptionNLessThanK() { $this->setExpectedException('MathPHP\\Exception\\OutOfBoundsException'); $k = 4; $n = 2; Combinatorics::lahNumber($n, $k); }