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Jan
29
awarded  Yearling
Dec
20
awarded  Popular Question
Dec
18
accepted $p$-adic orthogonal groups in four variables
Dec
16
asked $p$-adic orthogonal groups in four variables
Nov
21
comment Bounds on the number of zeros of a quadratic form
Thanks! I guess I have sorted out the situation using your previous comments.
Nov
20
comment Bounds on the number of zeros of a quadratic form
Thanks a lot for the references! I will look them up.
Nov
19
comment Bounds on the number of zeros of a quadratic form
Thanks for the reference. I mentioned that particular form as an example, but I am indeed interested in dimensions 3 and 4. I will look up Fricke and Klein.
Nov
19
comment Bounds on the number of zeros of a quadratic form
Will Jagy: Here is an example: Take (say) the form $Q(x,y,z)=x^2+y^2-5z^2$. Suppose I want to have solutions $(x,y,z)$ to $Q(x,y,z)=0$ such that $x$ is not divisible by a certain prime number $p$. Is there a guarantee I can get $cT log T$ of them with $|x|,|y|,|z|<T$?
Nov
19
asked Bounds on the number of zeros of a quadratic form
Nov
16
accepted The number of integral solutions to $x^2+y^2-az^2=0$
Nov
16
asked The number of integral solutions to $x^2+y^2-az^2=0$
May
16
accepted Orbits of the maximal compact subgroup on the light cone for $p$-adic groups
May
7
awarded  Good Answer
Apr
28
comment Orbits of the maximal compact subgroup on the light cone for $p$-adic groups
Thanks for the reposting and the clarification regarding SO(Q).
Apr
27
comment Orbits of the maximal compact subgroup on the light cone for $p$-adic groups
Dear few_reps: I have read your answer and am trying to see if I can make your proof and the one given below by Paul work for SO(Q). Please repost your answer. I will give feedback soon.
Apr
27
awarded  Popular Question
Apr
20
comment Orbits of the maximal compact subgroup on the light cone for $p$-adic groups
Thank Paul, I fixed it.
Apr
20
revised Orbits of the maximal compact subgroup on the light cone for $p$-adic groups
deleted 2 characters in body
Apr
20
asked Orbits of the maximal compact subgroup on the light cone for $p$-adic groups
Apr
2
asked A variant of Nelson-Hadwiger Problem on the chromatic number of the plane