> I don't get that from master. It is wrong, check for example the first branch of Piecewise:
In [210]: Piecewise((x*x**x*gamma(x + 1)/gamma(x + 2), Abs(x) < 1), (x*x**x*gamma(x + 1)/gamma(x + 2) + gamma(x + 1)/gamma(x + 2) + gamma(-x - 1)/gamma(-x), Abs(1/x) < 1), (meijerg(((1,), (x + 2,)), ((x + 1,), (0,)), x) + meijerg(((x + 2, 1), ()), ((), (x + 1, 0)), x), True)) Out[210]: Piecewise((x*x**x*gamma(x + 1)/gamma(x + 2), Abs(x) < 1), (x*x**x*gamma(x + 1)/gamma(x + 2) + gamma(x + 1)/gamma(x + 2) + gamma(-x - 1)/gamma(-x), Abs(1/x) < 1), (meijerg(((1,), (x + 2,)), ((x + 1,), (0,)), x) + meijerg(((x + 2, 1), ()), ((), (x + 1, 0)), x), True)) In [211]: _.args[0] Out[211]: (x*x**x*gamma(x + 1)/gamma(x + 2), Abs(x) < 1) In [212]: _[0] Out[212]: x*x**x*gamma(x + 1)/gamma(x + 2) In [213]: diff(_, x) Out[213]: x*x**x*(log(x) + 1)*gamma(x + 1)/gamma(x + 2) + x*x**x*gamma(x + 1)*polygamma(0, x + 1)/gamma(x + 2) - x*x**x*gamma(x + 1)*polygamma(0, x + 2)/gamma(x + 2) + x**x*gamma(x + 1)/gamma(x + 2) In [214]: _.subs(x, 0.5).evalf(100) Out[214]: 0.3865955836781125679972130152843116472164789835611979166666666666666666666666666666666666666666666667 In [215]: x**x Out[215]: x**x In [216]: _.subs(x, 0.5).evalf(100) Out[216]: 0.7071067811865475727373109293694142252206802368164062500000000000000000000000000000000000000000000000 -- You received this message because you are subscribed to the Google Groups "sympy" group. To unsubscribe from this group and stop receiving emails from it, send an email to sympy+unsubscr...@googlegroups.com. To post to this group, send email to sympy@googlegroups.com. Visit this group at http://groups.google.com/group/sympy?hl=en-US. For more options, visit https://groups.google.com/groups/opt_out.
