Mathematics in Python are not correct

[Luis Zarrabeitia]

On Thursday 08 May 2008 06:54:42 pm wxPythoner at gmail.com wrote:
> The problem is that Python parses -123**0 as -(123**0), not as
> (-123)**0.

Actually, I've always written it as (-123)**0. At least where I'm from, 
exponentiation takes precedence even over unary "-". (to get a power of -123, 
you must write $(-123)^0$ [latex])

Though not an authoritative source, wikipedia also uses the (-x)^y notation:
http://en.wikipedia.org/wiki/Exponentiation#Powers_of_minus_one

Btw, there seems to be a math problem in python with exponentiation... 

>>> 0**0
1

That 0^0 should be a nan or exception, I guess, but not 1.

[just found out while trying the poster's example]

-- 
Luis Zarrabeitia (aka Kyrie)
Fac. de Matemática y Computación, UH.
http://profesores.matcom.uh.cu/~kyrie