MathPHP\Probability\Distribution\Continuous\StudentT::PDF PHP Метод

    public static function PDF($x, int $ν)
    {
        Support::checkLimits(self::LIMITS, ['x' => $x, 'ν' => $ν]);
        $π = \M_PI;
        // Numerator
        $Γ⟮⟮ν＋1⟯∕2⟯ = Special::gamma(($ν + 1) / 2);
        $⟮1＋x²∕ν⟯ = 1 + $x ** 2 / $ν;
        $−⟮ν＋1⟯∕2 = -($ν + 1) / 2;
        // Denominator
        $√⟮νπ⟯ = sqrt($ν * $π);
        $Γ⟮ν∕2⟯ = Special::gamma($ν / 2);
        return $Γ⟮⟮ν＋1⟯∕2⟯ * $⟮1＋x²∕ν⟯ ** $−⟮ν＋1⟯∕2 / ($√⟮νπ⟯ * $Γ⟮ν∕2⟯);
    }