Possible Duplicate:

How to look up a symbol?

Why can I only use some capital greek letters inside my equations?

I want to use the big rho (`\Rho`

) in my document but can not find a package which provides that char. It is not in the default math package.

Is there a package with extended greek letters? Like here: http://en.wikibooks.org/wiki/LaTeX/Mathematics#List_of_Mathematical_Symbols

## Best Answer

As @Seamus correctly points out, capital Rho has the same glyph as capital P. You can put

`\newcommand{\Rho}{\mathrm{P}}`

into your preamble to make the macro`\Rho`

avialable. The usage of`\mathrm`

is necessary if you use default math alphabets, because all greek capitals are typeset in up-right font.List of those Greek letters whose capital variants coincide with latin capitals:

Plus remember that lowercase omicron looks exactly like

`o`

(and should be typeset by normal math font, i.e., without`\mathrm`

).