enumeration of sections in a chapter [duplicate]

Question

Possible Duplicate:
How to change section numbering to alphabetical, Roman numbers, etc

I am using the fancyhdr package to work with chapters. But I don't want to have the number of the chapter included in the section numbering. For example, I don't want to have

chapter 1

1.1 Introduction.

1.2 Conclusion.

The preamble concerning the fancyhdr package is

 \usepackage{fancyhdr}
 \fancyhead[LO]{\nouppercase{\rightmark}}
 \fancyhead[RE]{\nouppercase{\leftmark}}
 \fancyhead[LE,RO]{\thepage}
 \pagestyle{fancy}

Answer 1

Without any modifications to the book or report document classes (which support \chapter), the section printing mechanism is essentially given by

\renewcommand \thesection {\thechapter.\arabic{section}}

This includes the chapter-level numbering - \thechapter (and a period .) - as part of the section-level numbering. To remove this hierarchy, add

\renewcommand \thesection {\arabic{section}}

to your document preamble.