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I am using the ASME paper template http://iel.ucdavis.edu/code/ASME/, I am trying to use \boldsymbol{\theta} from \usepackage{amsmath} but it doesn't work, only shows a regular \theta. Does anyone know how to make it work? Thank you!

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  • Welcome to TeX.SX! Try bm package and the command \bm{\theta} ... \boldsymbol doesn's work on Greek characters ... bm package is used in such cases. – koleygr Apr 2 at 17:43
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    \boldsymbol should work fine for Greek characters, if you load a font that comes with a bold version. – Davislor Apr 2 at 17:44
  • Thanks for koleygr's suggestion, the bm package works perfectly with the asme template. – keroro Apr 2 at 17:52
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    The classes do \RequirePackage{times,mathptm} and both packages have been obsolete and deprecated for 25 years. No reasonable bold math can be obtained with them. Yes, \bm{\theta} yields a not so bad output, but try with other letters and you'll see why it is not the solution. – egreg Apr 2 at 21:52
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The template you link loads the obsolete mathptmx package. The simplest solution is probably to load bm (which will alias \boldsymbol to \bm). ETA: As @egreg warns, bm with mathptmx breaks on some installations, but you might not have an alternative if the publisher does not allow you to change the font.

You could also load newtxmath for a math font based on Times that does come in bold, but it is likely that the publisher won’t want you to do this.

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  • I would definitely not use \bm with mathptmx. I mean, unless you find output such as in this picture acceptable. I don't. – egreg Apr 2 at 21:48
  • @egreg I wouldn’t use mathptmx by choice, ever—the package description itself warns that it’s obsolete! Upgrading to newtxtext and newtxmath solves rhe problem. Assuming, however, that someone is not allowed to change the fonts, what would you recommend? – Davislor Apr 3 at 1:24
  • @egreg Good point. Added a note. – Davislor Apr 3 at 1:27
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I recommend that you try the newer ASME conference paper template, https://ctan.org/pkg/asmeconf, which is based on the modern newtx fonts and which will support \boldsymbol{\theta} and many other math characters.

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