Timeline for Oddities of evenness
Current License: CC BY-SA 4.0
32 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Jun 9, 2023 at 8:28 | answer | added | Mare | timeline score: 1 | |
| Jun 9, 2023 at 3:22 | answer | added | Kenta Suzuki | timeline score: 1 | |
| Jun 2, 2023 at 17:15 | answer | added | Oscar Lanzi | timeline score: 2 | |
| Jun 2, 2023 at 0:46 | answer | added | Gabe K | timeline score: 2 | |
| Jun 1, 2023 at 18:03 | comment | added | Pietro Majer | What is really odd to me is $2$… Why should be prime, it’s an even number! | |
| Jun 1, 2023 at 17:27 | answer | added | Michael Hardy | timeline score: 7 | |
| Jun 1, 2023 at 15:28 | history | made wiki | Post Made Community Wiki by Asaf Karagila♦ | ||
| Jun 1, 2023 at 15:12 | answer | added | Olivier Rozier | timeline score: 7 | |
| Jun 1, 2023 at 14:33 | answer | added | Timothy Chow | timeline score: 8 | |
| Jun 1, 2023 at 14:16 | answer | added | Timothy Chow | timeline score: 6 | |
| Jun 1, 2023 at 14:06 | answer | added | Timothy Chow | timeline score: 7 | |
| Jun 1, 2023 at 14:02 | answer | added | Timothy Chow | timeline score: 1 | |
| Jun 1, 2023 at 10:03 | history | became hot network question | |||
| Jun 1, 2023 at 6:35 | answer | added | Olivier | timeline score: 3 | |
| May 31, 2023 at 22:17 | comment | added | Terry Tao | @JohnBaez Not sure how juicy this is, but here is a restriction estimate of Bourgain and Guth that depends on the dimension mod 3: mathscinet.ams.org/mathscinet-getitem?mr=2860188 . (The paper also establishes an oscillatory integral estimate is new only in even dimensions, so technically also answers the OP question.) | |
| May 31, 2023 at 21:56 | comment | added | John Baez | What I want is juicy examples where what matters is the value of an integer mod 3. | |
| May 31, 2023 at 17:08 | comment | added | Geoffrey Irving | Field extensions over $\mathbb{R}$ are algebraically closed iff the degree is even. :) | |
| May 31, 2023 at 16:49 | answer | added | semisimpleton | timeline score: 14 | |
| May 30, 2023 at 20:48 | answer | added | Paata Ivanishvili | timeline score: 8 | |
| May 30, 2023 at 20:24 | comment | added | PseudoNeo | Does Feit-Thompson qualify? | |
| May 30, 2023 at 18:30 | answer | added | Terry Tao | timeline score: 26 | |
| May 30, 2023 at 9:04 | history | edited | gmvh | CC BY-SA 4.0 |
Improved formatting
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| May 30, 2023 at 8:09 | review | Close votes | |||
| Jun 9, 2023 at 3:06 | |||||
| May 30, 2023 at 7:20 | answer | added | Jukka Kohonen | timeline score: 12 | |
| May 30, 2023 at 7:16 | answer | added | Gerry Myerson | timeline score: 21 | |
| May 30, 2023 at 7:13 | comment | added | Jukka Kohonen | Not sure what kinds of answers are expected. Parity is ubiquitous in combinatorics and graph theory, e.g. many counting formulas have a parity-dependent term. But I guess most of these would go to the "trivial" bin. | |
| May 30, 2023 at 2:56 | comment | added | Sam Hopkins | There are probably many examples from topology and geometry where we have a $\mathbb{Z}/2$-valued invariant (of manifolds, say) which is an obstruction to something. I am not sure if this is what you are interested in… | |
| May 30, 2023 at 2:42 | history | edited | Manfred Weis | CC BY-SA 4.0 |
clarified that also classical results are acceptable as answers
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| May 30, 2023 at 2:38 | comment | added | Manfred Weis | @GerryMyerson it was not my intention to offend classical results as answers, so please don't hesitate to turn your comments into answers. My intent was rather to encourage also answers about results from personal research that may not be of high importance to the general (mathematical) public. | |
| May 30, 2023 at 1:22 | comment | added | Gerry Myerson | And then there's the values of $\zeta(n)$. | |
| May 30, 2023 at 1:17 | comment | added | Gerry Myerson | A classical result (I know you don't want it, but I'm going to mention it anyway) is that a polynomial with real coefficients is guaranteed to have a real zero if its degree is odd, no such guarantee if its degree is even. Here's another: $\int x^ne^{-x^2}\,dx$ is elementary if and only if $n$ is odd. | |
| May 29, 2023 at 7:30 | history | asked | Manfred Weis | CC BY-SA 4.0 |