Which package includes \Rho? (Big rho) [duplicate]

Question

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

Answer 1

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:

Α α alpha
Β β beta
Ε ε epsilon
Ζ ζ zeta
Η η eta
Ι ι iota
Κ κ kappa
Μ μ mu
Ν ν nu
Ο ο omicron
Ρ ρ rho
Τ τ tau
Υ υ upsilon
Χ χ chi

Plus remember that lowercase omicron looks exactly like o (and should be typeset by normal math font, i.e., without \mathrm).