## Evaluation of elements in the residue class field of number/function field

Hi,

I have a question. Let $F|\mathbb{F}_q$ be algebraic function field and $P$ is a rational place of $F$. suppose $f \in F$ is regular at $P$. Is there any algorithm to evaluate the image of $f$ in the residue class field $\tilde{F}_p= O_p/P$?

I know Magma can do that, but I am trying to know how I can do it myself for specific example?

-
Depends on how $F,P,f$ are presented to you. – Felipe Voloch May 22 2012 at 13:07