Bill Allombert on Sun, 28 Sep 2014 19:19:49 +0200 |
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Re: Specialize bivariate FpXY (C library) |
On Tue, Sep 09, 2014 at 09:28:46PM +0200, Bill Allombert wrote: > On Tue, Sep 09, 2014 at 01:43:39PM -0400, Dan Nichols wrote: > > Hello PARI users, > > > > Given an FpXY f(x,y) with main variable x and secondary variable y, > > I want to get the specialization f(r,y) for some r in Fp. It seems > > like the function I should use is: > > > > GEN FpXY_evaly(GEN Q, GEN y, GEN p, long vy) Q an FpXY, returns the > > FpX Q(X, y), where > > X is the second variable of Q. > > > > I assume vy is supposed to the the variable number for the secondary > > variable. > > Indeed, this is a bug, the parameter should be called vx.] > I fixed it in master. > > > When I try to call this function, the return value is > > always 1. > > Indeed, FpXY_evaly does work when y is 0, however the function works correctly > in the other case. This is due a bug in the code (we return the leading coef instead > of the constant coef by mistake). > > Thanks for reporting this issue, If you did not notice yet, we just released PARI 2.7.2 which fix this issue. Cheers, Bill.