How do I change the $\xi$ symbol in mathpazo

Question

I don't like the $\xi$ symbol that mathpazo comes with, so I want to go back to Computer Modern for that symbol alone. How can I do this?

You should follow the instructions listed in Importing a Single Symbol From a Different Font. — Werner, Oct 05 '12 at 22:41
I looked at that question, but I'm not sure how to find what number the \xi symbol is in the letters symbols — Moderat, Oct 05 '12 at 22:43

score 10 · Accepted Answer · answered Oct 05 '12 at 22:48

10

The code is in fontmath.ltx:

\DeclareMathSymbol{\xi}{\mathord}{letters}{"18}

To make the change you want, you can fetch the CM definition of letters and change it into

\DeclareSymbolFont{CMletters}{OML}{cmm}{m}{it}

and then

\DeclareMathSymbol{\xi}{\mathord}{CMletters}{"18}

answered Oct 05 '12 at 22:48

egreg

when i use \DeclareSymbolFont{CMlargesymbols}{OMX}{cmex}{m}{n}‎‎‎ \DeclareMathSymbol{\‎‏‎sum‎}{\mathop}{CMlargesymbols}{"50}‎‎‎, it results an error: "Command '\sum' already defined". how can i change the sum symbol? – smh Dec 07 '12 at 10:03
@smh I don't get this error; please, open a new question, with a link to this one, adding a minimal example producing the error. – egreg Dec 07 '12 at 12:13

1 Answers1