Timeline for What is the most useful non-existing object of your field?
Current License: CC BY-SA 3.0
11 events
| when toggle format | what | by | license | comment | |
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| Mar 15, 2015 at 21:32 | comment | added | Iian Smythe | For those not in the field, I think this is most dramatically stated in its equivalent form: a non-trivial elementary embedding $j:V\to V$. For those who live in $L$, a measurable cardinal would also be really nice if it existed, I suppose. | |
| Oct 6, 2014 at 15:16 | comment | added | Hagen von Eitzen | The world is his choice, isn't it? | |
| Sep 30, 2014 at 19:02 | comment | added | Toby Bartels | (Like my answer from intuitionistic mathematics.) | |
| Sep 30, 2014 at 18:47 | comment | added | Toby Bartels | If Emil's field of math is a world with AC, then this example qualifies. | |
| Sep 29, 2014 at 17:10 | comment | added | Emil Jeřábek | Nah, thank you, but so far I’m content to live in the world that is given to me. Anyway, the question asks for “non-existing objects you have come across”, not objects non-existing in every imaginable world. | |
| Sep 29, 2014 at 15:50 | comment | added | Asaf Karagila♦ | You only have one world? Poor guy, do you need a few? I have spares. :-) | |
| Sep 29, 2014 at 15:49 | comment | added | Emil Jeřábek | My world is an AC world. | |
| Sep 29, 2014 at 15:19 | comment | added | Asaf Karagila♦ | We don't know that they don't exist yet! They might exist in $\lnot\sf AC$ worlds. | |
| Sep 29, 2014 at 10:38 | review | Low quality posts | |||
| Sep 29, 2014 at 11:04 | |||||
| S Sep 29, 2014 at 10:16 | history | answered | Emil Jeřábek | CC BY-SA 3.0 | |
| S Sep 29, 2014 at 10:16 | history | made wiki | Post Made Community Wiki by Emil Jeřábek |