You may want to restrict the result to certain limit in the floating numbers
each system has its own levels of floating numbers and even a small difference is a difference to return FALSE On Tue, Feb 22, 2011 at 6:50 PM, christian schulze <xcr...@googlemail.com>wrote: > Hey guys, > > I just found out, how much Python fails on simple math. I checked a > simple equation for a friend. > > [code] > >>> from math import e as e > >>> from math import sqrt as sqrt > >>> 2*e*sqrt(3) - 2*e == 2*e*(sqrt(3) - 1) > False > [/code] > > So WTF? The equation is definitive equivalent. (See > http://mathbin.net/59158) > > PS: > > #1: > >>> 2.0 * e * sqrt(3.0) - 2.0 * e > 3.9798408154464964 > > #2: > >>> 2.0 * e * (sqrt(3.0) -1.0) > 3.979840815446496 > > I was wondering what exactly is failing here. The math module? Python, > or the IEEE specifications? > > -- > -- > http://mail.python.org/mailman/listinfo/python-list > -- Nitin Pawar
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