| public testLahNumberIdentityKEqualsOne ( integer $n ) | ||
| $n | integer | |
public function testLahNumberIdentityKEqualsOne(int $n)
{
$L⟮n、1⟯ = Combinatorics::lahNumber($n, 1);
$n！ = Combinatorics::factorial($n);
$this->assertEquals($L⟮n、1⟯, $n！);
}