|Bill Allombert on Thu, 11 Oct 2007 00:24:39 +0200|
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|Re: How recovering the b in Mod(a,b)?|
On Wed, Oct 10, 2007 at 11:53:28PM +0200, firstname.lastname@example.org wrote: > > Hello dear Pari/GP users, > > I have a may be very simple Problem. If I know x = Mod(a,b), then with "lift" I > can recover a, but how do I recover b? Thank you for any Answer. Use x.mod: ? Mod(1,4).mod %1 = 4 ? Mod(1,x^2+1).mod %2 = x^2 + 1 You could also use component(x,1): ? component(Mod(1,4),1) %3 = 4 ? component(Mod(1,x^2+1),1) %4 = x^2 + 1 Cheers, Bill.