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I am using the package MinionPro. But I need some symbols, for example, \gnapprox and \mho, available on the package amssymb.

Well, here is my code (as minimal as possible):


\[\gnapprox \]

\[\mho \]

But I got the errors:

Command `\mathfrak' already defined. \DeclareMathAlphabet{\mathfrak}{U}{euf}{m}{n}
Command `\mathfrak' not defined as a math alphabet. ...athAlphabet{\mathfrak}{bold}{U}{euf}{b}{n}
Command `\centerdot' already defined. ...ymbol{\centerdot} {\mathbin}{AMSa}{"05}
Command `\veebar' already defined. ...mbol{\veebar} {\mathbin}{AMSa}{"59}
Command `\barwedge' already defined. ...mbol{\barwedge} {\mathbin}{AMSa}{"5A}
Command `\doublebarwedge' already defined. ...ol{\doublebarwedge} {\mathbin}{AMSa}{"5B}
Command `\circledS' already defined. ...mbol{\circledS} {\mathord}{AMSa}{"73}
Command `\dotplus' already defined. ...mbol{\dotplus} {\mathbin}{AMSa}{"75}
Command `\complement' already defined. ...mbol{\complement} {\mathord}{AMSa}{"7B}
Command `\divideontimes' already defined. ...ol{\divideontimes} {\mathbin}{AMSb}{"3E}
Command `\thicksim' already defined. ...ol{\thicksim} {\mathrel}{AMSb}{"73}
Command `\thickapprox' already defined. ...ol{\thickapprox} {\mathrel}{AMSb}{"74}
Command `\hslash' already defined. ...ol{\hslash} {\mathord}{AMSb}{"7D}

How is the right way to use both packages?

share|improve this question
take a look at the answer to this question to see how to include just a few symbols from a font. the symbols \gnapprox and \mho are in the msbm10 font. you can texdoc amsfonts and look in appendix e (p.37) for their location in the font, or set your own font chart using the technique in the answer already mentioned. – barbara beeton Jan 23 '13 at 16:24
@barbarabeeton, great! I'm editing that solution to my case but I don't know what to do with the command \hyphenchar\font45. Should I change something? Should I look at the font table to some particular glyph? – Sigur Jan 23 '13 at 16:38
you can simply ignore the \hyphenchar\font45 and leave an empty group {} in its place. \hyphenchar is really needed only for text fonts. the relevant command for msbm is in the file umsb.fd: \DeclareFontFamily{U}{msb}{} – barbara beeton Jan 23 '13 at 16:56
i don't have access to minion pro, so i can't really investigate this. but instead of msbm10 you might try msbm9, making a wild guess that minion symbols really are generally smaller than computer modern (which is what msbm is based on). – barbara beeton Jan 23 '13 at 17:10
Note also that MnSymbol, desgined to work with Minion, has some of the symbols, e.g., \gnapprox. However, it seems that there is no \mho. – mafp Jan 23 '13 at 17:55

1 Answer 1

gnapprox is also available in MnSymbol, though slighly different from the amssymb version. Here is a variant so that the mhosymbol lies on the baseline:


\def\mho{\raisebox{0.96\depth}{\scalebox{1}[-1]{$ \Omega $}} }


\[ \gnapprox\rlap{\rule[-0.1pt]{1cm}{0.1pt}}{\mho\enspace \Omega

} ]


enter image description here

share|improve this answer
Given that all other characters with rounded features at the baseline are allowed some undershoot (i.e., their lower "edges" are allowed to intersect the baseline ever so slightly), I would have said it's OK to give some undershoot to \mho as well. However, there's no arguing about taste, right? – Mico Aug 31 '14 at 8:52
The problem is that without adjustment, the mho symbol does not intersect the base line: it's slightly above it. Don't you think it's more problematic? What's funny is the same trick with Computer Modern requires no adjustment. – Bernard Aug 31 '14 at 9:01
OK, not having the fonts that go with the MinionPro package, I wasn't aware of the problem with the unadjusted \mho symbol. I'd guess that a very slight undershoot -- mimicking the extent of the undershoot in the letter O -- would be best. – Mico Aug 31 '14 at 9:07
Yes. In my proposed code, one could change 0.96\depth to 0.95\depth. – Bernard Aug 31 '14 at 9:10
But I can't use XeLaTeX with the above. At least in this system, a similar problem to ensued – doed Aug 31 '14 at 14:30

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