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How can I get bold math symbols?

I use for bold Greek letters the command \boldsymbol for other maths expression \mathbf, but the font weight is not the same. How can I get the font weight of bold Greek letters the same as using \mathbf?

marked as duplicate by yo', percusse, Claudio Fiandrino, lockstep, egreg Aug 26 '12 at 15:49

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    bm package is useful for bold Greek characters. – percusse Aug 26 '12 at 10:58
  • @percusse -- i'm not sure this question is the same as the one pointed out in the reason for closing. in the example there, the weight of the bold lowercase greek appears to be not as bold as that of the lowercase roman, and it isn't. default bold math (\mathbf} with computer modern fonts uses the font cmbx* which is an extended font. \boldsymbol or bm use the only cm font that is usually available in bold, cmmib10, which is not an extended font. thus the bold greek letters are indeed not as "bold" as the roman. – barbara beeton Aug 26 '12 at 18:30
  • @barbarabeeton I have voted for closing since there is a XeLaTeX answer that I have also used. But my comment is just a suggestion. Nevertheless I can ping the powers that be to reopen the question if you would like to teach me about it. – percusse Aug 26 '12 at 18:46
  • @persusse -- using a different font family (which can easily be done with xelatex) would remove the problem. but it's impossible with the default font complement of computer modern. i don't necessarily advocate reopening the question, but what might be worth doing is to add an explanatory comment to the cited question. (i addressed you with the comment since yours was the only one present, and only one "target" is recognized.) – barbara beeton Aug 26 '12 at 18:51
  • @barbarabeeton No problem. I've also asked for moderator opinion. But do you know an easy way out with the available standard fonts? – percusse Aug 26 '12 at 18:57

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