> > >> For Sage, fixing the problem is actually trivial: when the > hypergeometric > >> function is a polynomial (and at least when the inputs are exact), > don't > >> call mpmath; just evaluate the polynomial directly and then call .n() > on the > >> result. > >> > > > > Except then Sage would have to know when it is a polynomial, and > probably we > > would need to ask Maxima for that (assuming it knows). So maybe not > > completely trivial to make sure it works. > > It's a polynomial when any of the first parameters is a nonpositive > integer. > > Is that "if and only if"? That would certainly be convenient.
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