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I have wrote a text of math with several pages. How can I change all the math symbols to bold math symbols?

I know from the page How can I get bold math symbols? that I can use \boldsymbols or \mathbf after every dollor. But is there any global way to achieve that? (for example are there a code before \begin{document} like "\renewcommand...")

Jo Jomax
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    \boldmath in the preamble would take care of most (but not all) symbols. – campa Aug 27 '21 at 13:46
  • Off-topic: how you will distinguish vector from scalar variables? I wouldn't do that. – Zarko Aug 27 '21 at 13:50
  • @campa Yes. It works for all my symbols. Thank you very much. Do you know How I can find the symbols that works with this command? – Jo Jomax Aug 27 '21 at 13:58
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    it depends which fonts you are using, if there is no bold font you'll get the normal weight one, eg \mathbb fonts are typically not available in bold, and if you choose a non standard math font set some have no bold at all. – David Carlisle Aug 27 '21 at 14:02
  • @Zarko I think we can use \unboldmath for scalar variables. – Jo Jomax Aug 27 '21 at 14:06
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    I don't know what is background of your intention, that you oppose usual, vell establish and supported, typographically deliberate selected way of writing math. However, I would do this., but you are free to do what you like :-) – Zarko Aug 27 '21 at 14:24

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