[seqfan] Finding numbers represented by indefinite binary quadratic forms
Neil Sloane
njasloane at gmail.com
Wed Jun 4 06:41:07 CEST 2014
Does anyone have a program for doing the following:
Given an indefinite binary quadratic form ax^2+bxy+cy^2 (with discriminant
b^2-4ac>0 and not a square) and a positive or negative number n, decide if
ax^2+bxy+cy^2 = n has a solution.
(If n = p is a prime, one can use the PARI command qfbsolve(Qfb(a,b,c),p) )
Neil
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