Status: Accepted
Owner: asmeurer
Labels: Type-Defect Priority-Medium Polynomial
New issue 2602 by asmeurer: Definition of "homogeneous" in the polys module
is wrong
http://code.google.com/p/sympy/issues/detail?id=2602
I talked with Mateusz about this at the SciPy conference. The polys
defines "homogeneous" to mean "zero constant term". But the standard
definition of a homogeneous polynomial is that each term has the same total
degree (see http://en.wikipedia.org/wiki/Homogeneous_polynomial and
http://en.wikipedia.org/wiki/Homogeneous_function, as well as the
homogeneous_order() function). This definition should be changed, and any
code that checks is_homogeneous should be changed to use nth(0) == 0 (or
else a new property with a different name can be added for this).
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