Comment #11 on issue 2104 by matt...@gmail.com: canonical ordering of terms
http://code.google.com/p/sympy/issues/detail?id=2104
I fixed this in a35aed24bd016b3fd0e4d51113373f6f33530542, so workarounds
won't be necessary anymore, e.g.:
In [1]: latex(x**2 + 1, order='lex')
Out[1]: x^{2} + 1
In [2]: latex(x**2 + 1, order='rev-lex')
Out[2]: 1 + x^{2}
In [3]: expr = x**3 + x**2*y + 3*x*y**3 + y**4
In [4]: latex(expr, order='lex')
Out[4]: x^{3} + x^{2} y + 3 x y^{3} + y^{4}
In [5]: latex(expr, order='grlex')
Out[5]: 3 x y^{3} + y^{4} + x^{3} + x^{2} y
Also regarding #3, this also was fixed. Now it's hash independent (thus
platform independent).
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