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I searched this problem for two hours and couldn't find anything.

I am writing some mathematical stuff with theorems like "Definition, Satz, Bemerkung". Now I just want to list some characteristics of a function, for example the derivation. So I want only the number of the theorem, no name!

I hope you can understand what I mean...

I uploaded a picture to make it more clearly. There you see the (17.3) is wihtout a name contrary to (17.4) with the name "Satz".

Thank you already for your help!

I enter image description here

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    Welcome to TeX.SE! We prefer full examples, but I think, you mean \label{meintollersatz} after \begin{satz} and refer to it with \ref{meintollersatz} (Or whatever you called your 'Satz' theorem). Or do you just want to omit the Satz as lead-in?
    – user31729
    Sep 4 '15 at 9:00
  • 2
    Can you add the code that defines the present result?
    – egreg
    Sep 4 '15 at 9:18
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You can try this:

\documentclass{article}

\usepackage{amsmath, amsthm, amssymb}

\newtheoremstyle{dotless}{}{}{\itshape}{}{\bfseries}{}{ }{} %get rid of the
                                %dot after the thm number

\theoremstyle{dotless}
\newtheorem{numb}{}[section]

\renewcommand{\thenumb}{(\thesection.\arabic{numb})}

\begin{document}

\section{First Section}

\begin{numb}
  F\"ur alle $k\in\mathbb{Z}$ gilt $\exp(k)=e^k$.
\end{numb}


\end{document}

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