MathPHP\LinearAlgebra\Matrix::minor PHP Method

    public function minor(int $mᵢ, int $nⱼ)
    {
        if (!$this->isSquare()) {
            throw new Exception\MatrixException('Matrix is not square; cannot get minor of a non-square matrix');
        }
        if ($mᵢ >= $this->m || $mᵢ < 0) {
            throw new Exception\MatrixException('Row to exclude for minor does not exist');
        }
        if ($nⱼ >= $this->n || $nⱼ < 0) {
            throw new Exception\MatrixException('Column to exclude for minor does not exist');
        }
        return $this->minorMatrix($mᵢ, $nⱼ)->det();
    }