### 2.24.5 Polynomial valuation : `valuation ldegree`

`valuation` or `ldegree` takes as argument a polynomial given
by a symbolic expression or by the list of it’s coefficients.

`valuation` or `ldegree` returns the valuation of this
polynomial, that is the lowest degree of it’s non-zero monomials.

Input :

`valuation(x``^`

`3+x)`

Output :

`1`

Input :

`valuation([1,0,1,0])`

Output :

`1`