fancyhdr headings , how to remove the number of the section

I'm French so it's not easy to explain my problem but I'll try.

I use fancyhdr to make my own headings (book class).

I want the section's title at the right of the heading in small caps, and only in odds pages. But when I print it I can read e.g., "2. DERIVATION" which is what I was expecting.

My question is: how can I remove the number of the section, so that I can obtain just "DERIVATION" and not "2.DERIVATION"?

I wrote :

``````\usepackage{fancyhdr}
\pagestyle{fancy}
\fancyfoot{} % clear all footer fields
\fancyfoot[LE,RO]{\thepage}
\renewcommand{\footrulewidth}{0 pt}
``````

`\leftmark` is for chapter and is OK.

The problem is with the `\rightmark`, how can I redefine it?

-
Welcome to TeX.sx! A tip: If you indent lines by 4 spaces, then they are marked as a code sample. You can also highlight the code and click the "code" button (with "{}" on it). –  egreg Jul 26 '11 at 15:07

``````\renewcommand{\sectionmark}[1]{\markright{#1}}