On Friday, March 11, 2016 at 9:15:34 PM UTC+1, Aaron Meurer wrote: > > SymPy gives I*pi for sqrt(-12*polylog(2,-1)). According to > > http://docs.sympy.org/latest/modules/functions/special.html#sympy.functions.special.zeta_functions.polylog > > <http://www.google.com/url?q=http%3A%2F%2Fdocs.sympy.org%2Flatest%2Fmodules%2Ffunctions%2Fspecial.html%23sympy.functions.special.zeta_functions.polylog&sa=D&sntz=1&usg=AFQjCNFpdquUHnMXCbozinFt7hDWQBTHMw>, > > > polylog(s, -1) is the same as dirichlet_eta(s). The definitions for > polylog in the sympy and mpmath docs look the same, so is SymPy wrong > here, or am I missing something (WolframAlpha seems to agree with > mpmath)? >
It should be polylog(s,-1) = -dirichlet_eta(s). Fredrik -- 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 [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/sympy. To view this discussion on the web visit https://groups.google.com/d/msgid/sympy/669f9afa-fbed-4002-aa77-f7f1cdbdec85%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
