# Evaluate a list

Hi,

Suppose for example `E =[x,x^2,x+1]`

is a list of elements in `ZZ[x]`

. Let `K`

be a number field defined in Sage

```
K.<a> = NumberField(f(x))
```

for some irreducible polynomial $f(x)$. Then how can one evaluate the list `E`

by setting $x=a$ and $x=\sigma(a)$ (conjugate of a) in Sage?