Timeline for Question about $i$ versus $-i$
Current License: CC BY-SA 4.0
19 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Apr 15, 2021 at 0:29 | comment | added | Steven Landsburg | @NateEldredge : good guess, but no. | |
| Apr 14, 2021 at 22:45 | comment | added | Nate Eldredge | Could it be Model theory of the complex numbers with conjugation? | |
| Apr 14, 2021 at 9:00 | comment | added | Incnis Mrsi | Related: matheducators.stackexchange.com/questions/7192/… | |
| Apr 12, 2021 at 10:18 | comment | added | Gerald Edgar | see also math.stackexchange.com/q/672795/442 | |
| Apr 7, 2021 at 6:56 | answer | added | David Corfield | timeline score: 1 | |
| Apr 6, 2021 at 23:18 | answer | added | LSpice | timeline score: 2 | |
| Apr 6, 2021 at 19:40 | answer | added | Joel David Hamkins | timeline score: 40 | |
| Apr 6, 2021 at 17:27 | comment | added | Steven Landsburg | @DmitriPavlov: The main thing I'm trying to remember is exactly what the question was. | |
| Apr 6, 2021 at 13:26 | comment | added | Dmitri Pavlov | Why not simply ask this question yourself? If such a question was asked before, this one will be closed as a duplicate, and you will find out what the original question was. If it was not asked, you will still receive answers. | |
| Apr 6, 2021 at 1:58 | history | became hot meta post | |||
| Apr 5, 2021 at 18:03 | comment | added | Donu Arapura | I remember that in Théorie de Hodge that Deligne makes a point of discussing how the choice of $i$ influences various things such as orientations of complex manifolds. So perhaps it's not such silly question. ( I don't know where it is on MO.) | |
| Apr 5, 2021 at 17:53 | comment | added | Tim Campion | I think somebody once even told me that the physicist's $i$ is the mathematician's $-i$. Looking back, I'm pretty sure they were joking :). Although there are weird places where discrepancies like this come up between physics and math conventions. For instance, I believe the physicists' $su(n)$ is really $\pm i$ times the mathematician's $su(n)$, and I can easily imagine discrepancies arising from whether you choose $i$ or $-i$ to be the relevant factor. | |
| Apr 5, 2021 at 17:14 | comment | added | Yemon Choi | I'm afraid I can't help, but your description does ring a bell. Perhaps either the question or one of the comments/answers mentioned Gal(C/R)? | |
| Apr 5, 2021 at 10:17 | history | edited | Martin Sleziak |
edited tags
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| Apr 5, 2021 at 9:43 | comment | added | Emil Jeřábek | I also seem to vaguely remember it, but cannot find it. I only found a (rather unexciting) related question on math.SE (math.stackexchange.com/questions/177594/how-to-tell-i-from-i). | |
| Apr 5, 2021 at 6:18 | comment | added | Steven Landsburg | @DanPetersen: Thank you, but that's not it. The question I'm remembering (perhaps incorrectly?) appeared (at least to me) to have much less mathematical content than this one (though the answer/comment I'm remembering suggested that there was more mathematical --- or perhaps philosophical --- content than had met my eye). | |
| Apr 5, 2021 at 6:12 | comment | added | Dan Petersen | Is it possible that you're thinking of this one? It's about quaternions, not complex numbers, with a nice answer by Matt Emerton. mathoverflow.net/questions/53822 | |
| Apr 5, 2021 at 3:46 | history | edited | Steven Landsburg | CC BY-SA 4.0 |
added 7 characters in body
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| Apr 5, 2021 at 1:29 | history | asked | Steven Landsburg | CC BY-SA 4.0 |