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Jan
29
accepted Upper bound on answer for Pell equation
Jan
28
comment Upper bound on answer for Pell equation
@martin you are right, sorry. This question now refers to your MSE question rather than one of my answers, and mentions you by username. I also put a comment at your MSE question linking back to here.
Jan
28
revised Upper bound on answer for Pell equation
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Jan
28
awarded  Nice Question
Jan
28
revised Upper bound on answer for Pell equation
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Jan
27
revised Upper bound on answer for Pell equation
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Jan
27
asked Upper bound on answer for Pell equation
Jan
9
awarded  Yearling
Jan
6
awarded  Nice Question
Dec
23
comment Nontrivial conditions under which $x+y+z$ divides $1 - xyz$
math.stackexchange.com/questions/1586758/…
Dec
14
comment Indefinite Ternary Forms with Square Discriminant
@Campello, yes, I suppose. For each odd prime dividing the discriminant, which is $4 a^2 b^2$ for you, check whether the form represents four things: a residue $\pmod p,$ a nonresidue, then $p$ times a residue and $p$ times a nonresidue. If this works, that prime does not matter at all. For the prime $2$ it would be all $1,3,5,7 \pmod 8$ and $2,6,10,14 \pmod {16}.$ Well, I sent you my 100-page writeup, that is a good start. You also need to be able to deal with anisotropy, which we see in the $4^k$ and $25^k$ terms in the obstructions for your $2,5,-10$ example.
Dec
14
revised Indefinite Ternary Forms with Square Discriminant
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Dec
12
revised Indefinite Ternary Forms with Square Discriminant
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Dec
12
revised Indefinite Ternary Forms with Square Discriminant
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Dec
12
revised Indefinite Ternary Forms with Square Discriminant
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Dec
12
answered Indefinite Ternary Forms with Square Discriminant
Dec
11
revised Fricke Klein method for isotropic ternary quadratic forms
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Dec
11
revised Fricke Klein method for isotropic ternary quadratic forms
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Dec
11
revised Fricke Klein method for isotropic ternary quadratic forms
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Dec
10
answered Fricke Klein method for isotropic ternary quadratic forms