Timeline for Quadratic refinements of a bilinear form on finite abelian groups
Current License: CC BY-SA 4.0
7 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Aug 4 at 18:33 | history | became hot network question | |||
| Aug 4 at 12:53 | vote | accept | Andrea Antinucci | ||
| Aug 4 at 11:34 | answer | added | Sean Eberhard | timeline score: 7 | |
| Aug 4 at 11:04 | comment | added | Sean Eberhard | Incidentally I was expecting to see the requirement $q(na) = n^2 q(a)$ for all $n \in \mathbb Z$, but I see this actually follows from $q(-a) = q(a)$. | |
| Aug 4 at 11:03 | comment | added | Sean Eberhard | Question 2 is trivial: it is the set of all functions $q :A \to \mathbb R / \mathbb Z$ such that $q(-a) = q(a)$ and $q(a+b) = q(a) + q(b)$ identically, which is obviously $\mathrm{Hom}(A, \frac12 \mathbb Z / \mathbb Z)$. | |
| Aug 4 at 10:36 | history | edited | YCor | CC BY-SA 4.0 |
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| Aug 4 at 10:32 | history | asked | Andrea Antinucci | CC BY-SA 4.0 |