Timeline for Unnecessary uses of the axiom of choice
Current License: CC BY-SA 4.0
3 events
| when toggle format | what | by | license | comment | |
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| Feb 17, 2022 at 22:02 | comment | added | Tom Leinster | Thanks. I think I'd count that as an example where a significant new idea was needed to pass from the proof using choice to the proof without. As I understand the history, Cantor first proved the theorem using the same proof as you, and only later did Bernstein find a choice-free proof, which was entirely different. (Schröder's only contribution was a wrong proof which he later retracted, but somehow his name stuck -- at least in English. The French, more accurately, call it the Cantor-Bernstein theorem.) | |
| Feb 17, 2022 at 21:47 | history | made wiki | Post Made Community Wiki by Stefan Kohl♦ | ||
| Feb 17, 2022 at 21:22 | history | answered | Michael Hardy | CC BY-SA 4.0 |