MathPHP\Functions\Polynomial::multiply PHP Метод

    public function multiply(Polynomial $polynomial) : Polynomial
    {
        // Calculate the degree of the product of the polynomials
        $productDegree = $this->degree + $polynomial->degree;
        // Reverse the coefficients arrays so you can multiply component-wise
        $coefficientsA = array_reverse($this->coefficients);
        $coefficientsB = array_reverse($polynomial->coefficients);
        // Start with an array of coefficients that all equal 0
        $productCoefficients = array_fill(0, $productDegree + 1, 0);
        // Iterate through the product of terms component-wise
        for ($i = 0; $i < $this->degree + 1; $i++) {
            for ($j = 0; $j < $polynomial->degree + 1; $j++) {
                // Calculate the degree of the current product
                $degree = $productDegree - ($i + $j);
                // Calculate the product of the coefficients
                $product = $coefficientsA[$i] * $coefficientsB[$j];
                // Add the product to the existing coefficient of the current degree
                $productCoefficients[$degree] = $productCoefficients[$degree] + $product;
            }
        }
        return new Polynomial($productCoefficients);
    }