[Tex/LaTex] Unindented proof in amsbook


I am using the proof environment in amsbook. Unlike amsart, the proof is automatically indented. Is there a way of cancelling the indentation?

\noindent This is a non-indented sentence.
This is a proof.

Best Answer


  {\normalparindent}{0pt }{}{}

which is equivalent (but shorter) to redefining the proof environment as follows

  \normalfont \topsep6\p@\@plus6\p@\relax
  \itemindent\z@ % original has \normalparindent
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