Timeline for Element in the absolute Galois group of the rationals
Current License: CC BY-SA 4.0
5 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Jul 4 at 4:19 | history | edited | Martin Sleziak | CC BY-SA 4.0 |
http -> https (the question has been bumped anyway)
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| Nov 25, 2009 at 17:08 | comment | added | Tyler Lawson | For Galois automorphisms of C, you actually need the axiom of choice for any to exist because (as an exercise) any others are Q-linear but not R-linear and hence are nonmeasurable functions. I am not sure if you actually need the axiom of choice to show that there are nontrivial Galois automorphisms of the closure of Q, but it may be similar - you need to make a choice of lift of the automorphism for every finite Galois extension F of Q in some compatible way. | |
| Nov 25, 2009 at 14:06 | comment | added | Mariano Suárez-Álvarez | I have no idea what exactly she meant. | |
| Nov 25, 2009 at 13:23 | comment | added | Lior Bary-Soroker | what do you mean by `write-down'? | |
| Nov 25, 2009 at 13:12 | history | answered | Mariano Suárez-Álvarez | CC BY-SA 2.5 |