I saw this message on IRC today (I was away from my machine, so I couldn't 
respond):

alekz joined the chat room. [10:46am]
alekz: hello [10:46am]
alekz: do you know if anyone ever created a sympy cheat sheet? [10:46am]
alekz left the chartroom. (Quit: done.) [11:01am]

I don't think we have one, but I think we should.  It would just be one or two 
pages of a down-and-dirty reference to common functions and tasks, like:

powsimp(expr, deep=False, combine='all') - Combine common bases and exponents 
in an expression.
nsimplify(expr, constants=[], tolerance=None, full=False) - Find a simple 
formula that numerically matches the given expression. 

etc.  

For example, here is a LaTeX cheat sheet:  http://www.stdout.org/~winston/latex/
and here is a Maple cheat sheet (PDF): 
http://math.mtsac.edu/resources/maple11_cheatsheet1.pdf

What do you think?

Aaron Meurer

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