# \part doesn't appear in TOC

I use the article document class and I created a TOC. It works fine and uses the \section to write the header, but the problem is that the first page after my TOC is the introduction and there I used \part without any \section. This is not recognized and so on the introduction page in the header it says "Contents" and not "Introduction". Can anyone help?

\tableofcontents
\newpage
\setcounter{page}{1}
\input{Chapter1}
%\newpage
\input{Chapter2}

etc.

and the chapters are like:

\part{Chapter1}
\part{Chapter2}
\section
\section

But the problem is, Chapter 1 has no \section and is not recognized.

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I'm not sure I completely understand your problem. First of all it puzzles me that you use the part structure (which you call chapter). Part uses roman numbering - are you sure you want that? The highest structure level in an article class (that is using latin numbers) is as far as I know the section and in any case, the syntax to use it is: \section{This is the title of my section}. This title then also appears in the toc. –  Philipp Apr 8 '12 at 17:37
@Philipp The standard article class does feature \part (here not followed by a page break). –  lockstep Apr 8 '12 at 17:43
I know, but I was just confused by the way it is used. Anyway, as far as I can grasp the problem the only problem I see is how the section command was used. Else I dont see why this shouldn't work. –  Philipp Apr 8 '12 at 17:49
Please, provide a real example of what you're doing. However, using article and \part to emulate chapters is quite strange: use the book class. –  egreg Apr 8 '12 at 19:18

## 2 Answers

If the answer is really that simple, I'll give it a shot:

To use the section command you need to pass an argument, namely the name of the section which looks like this:

\section{Introduction}

This line then creates an entry in the toc with the name Introduction and also creates a section within the document with this title.

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well, thanks for your answers but it does not solve my problem, I want that \part and you said that article does feature it, so it should work, but it doesnt, the \part{Introduction} is not in the header which is created by the toc. You know what I mean? It is in the toc, but the header on the next page says "content" and not "Introduction". –  useranflatex Apr 8 '12 at 19:18

You must issue a \mark command to fill the header. Probably \markright{Introduction}.

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That certainly works for the first page where the command is issued but am I right when I say it needs manually repeated if there are more than just one page (which could be a bit tedious if that part is a long one - but then again, since there occurs no section it rather unlikely to be that long)? –  Philipp Apr 8 '12 at 21:41
The effect of a \mark command doesn't end at a page break. Also remark that the question title speaks of the toc. But the text of the header. –  Ulrike Fischer Apr 8 '12 at 22:03
hey Ulrike thanks a lot! it really worked! thanks!! –  user13408 Apr 9 '12 at 6:25
@useranflatex Please don't post comments as another answer. I converted your non-answer to a comment to Ulrike's answer. And if you like her answer, please consider upvoting and accepting it. –  Stefan Kottwitz Apr 9 '12 at 9:20