CGAL 5.4 - Polynomial
PolynomialTraits_d::Invert Concept Reference

## Definition

This AdaptableUnaryFunction inverts one variable in a given PolynomialTraits_d::Polynomial_d, that is, for a given polynomial $$p$$ it computes $$x^{degree(p)}p(1/x)$$.

Note that this functor operates on the polynomial in the univariate view, that is, the polynomial is considered as a univariate polynomial in one specific variable.

This functor is provided for efficiency reasons, since this operation just inverts the order of the coefficients with respect to the specified variable.

Refines:

AdaptableUnaryFunction

CopyConstructible

DefaultConstructible

Polynomial_d
PolynomialTraits_d

## Types

typedef PolynomialTraits_d::Polynomial_d result_type

typedef PolynomialTraits_d::Polynomial_d argument_type

## Operations

result_type operator() (argument_type p)
Returns $$x^{degree(p)}p(1/x)$$, where x refers to the outermost variable $$x_{d-1}$$.

result_type operator() (argument_type p, int i)
Return $$x^{degree(p,i)}p(1/x)$$, where x refers to the variable $$x_{i}$$. More...

## ◆ operator()()

 result_type PolynomialTraits_d::Invert::operator() ( argument_type p, int i )

Return $$x^{degree(p,i)}p(1/x)$$, where x refers to the variable $$x_{i}$$.

Precondition
$$0 \leq i < d$$.