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I need a \wideparen symbol in a book prepared with amsbook class. I know about a few packages providing this command but...

  • ymath does not work with current version of AMS classes
  • MnSymbol, mathabx, fourier - all substitute the default math font and this is not what I need (and what the publisher would allow). I need to keep the standard fonts for everything else, but only add this single symbol.

Any ideas how to do that ?

share|improve this question
By ymath do you mean yhmath? That package works fine with amsbook for me. – Ian Thompson Aug 29 '12 at 19:38
Unfortunately, pdflatex goes into an infinite loop after I add yhmath to the package list. I didn't try to find what is the source of the problem, however some comments I spotted on internet suggested an incompatibility between yhmath and AMS classes. – P.K. Aug 30 '12 at 15:02
up vote 4 down vote accepted

here's a not-so-little test file that will illustrate the inclusion of a wide paren (and also a wide check) from the mathx font using amsart. since amsbook is a sibling of amsart, it will work there too. (this is one of the ams internal "how to" files; i didn't edit it for conciseness.)


%% code from mathabx.sty and mathabx.dcl
      <5> <6> <7> <8> <9> <10>
      <10.95> <12> <14.4> <17.28> <20.74> <24.88>



A wide check should match a wide hat, but inverted.  Observe that
the forms provided have a maximum width.  Some other wide accents
in \verb|mathx| aren't available otherwise.
\cs{widehat}:\quad & \widehat{A}\quad\widehat{AB}\quad
\cs{widecheck}:\quad & \widecheck{A}\quad\widecheck{AB}\quad
\cs{wideparen}:\quad & \wideparen{A}\quad\wideparen{AB}\quad

share|improve this answer
This works. Yhank you. – P.K. Aug 30 '12 at 14:59

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