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  • I was using fontspec and unicode-math before with Minion Pro like in your answer, but as pxfonts looks the same I don't see the point of using it, as it is so damn slow. As it works with unicode-math my code is written like in your answer, but now I would like to change back to non-unicode fonts. Are you aware of a pxfonts-specific solution? Apart from that, the first Phi should be italic. Commented Nov 9, 2015 at 14:57
  • I don't know a pxfonts specific solution, Imho it would be rather difficult and time consuming to set it up. In legacy tex the greek symbols are spread around: some uppercase upright in OT1, some italic upper + lowercase in OML, the rest must probably be pulled from LGR. I changed the math-style to get an italic Phi. Commented Nov 9, 2015 at 15:09
  • Alright, it appears to me that the my best option is to use \deltaup etc. and in case I switch back to unicode math someday, redefine all greek letters by something like \let\deltaup\delta. I don't really know what to do with your answer now, I appreciate your help, but completely changing the font engine is not really a solution in my eyes. Commented Nov 9, 2015 at 15:29
  • Well you wrote "I accept "no" as an answer.", and that's what I'm saying in the first sentence. I expanded a bit regarding the "no" for the pxfonts. Commented Nov 9, 2015 at 16:04
  • That was the workaround I was looking for! thank you! And yes, now also the "no" is clearer ;) Commented Nov 9, 2015 at 17:45