How should I deal with numbering of claims?

Question

I've defined my claim in the following way: \newtheorem{claim}{Claim} The numbering works perfectly fine, but what should I do in cases when I want to skip some numbering. That is:

Claim 1: ....

Claim 2: ....

Claim: //just claim without numbering!

Claim 3:....

Answer 1

You can declare an un-numbered claim by

\newtheorem*{claim*}{Claim}

The starred version produces no number. When you don't want numbering use

  \begin{claim*}
    Some claim with no number
  \end{claim*}

MWE:

\documentclass{article}
\usepackage{amsthm}
\newtheorem{claim}{Claim}
\newtheorem*{claim*}{Claim}
\begin{document}
  \begin{claim}
    Some claim
  \end{claim}
  \begin{claim}
    Some claim
  \end{claim}
  \begin{claim*}
    Some claim with no number
  \end{claim*}
  \begin{claim}
    Some claim
  \end{claim}
\end{document}