Timeline for No injective groups with more than one element?
Current License: CC BY-SA 3.0
10 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Jun 21, 2012 at 20:35 | vote | accept | Michael Barr | ||
| Jun 21, 2012 at 16:21 | answer | added | Theo Buehler | timeline score: 10 | |
| Jun 21, 2012 at 16:03 | comment | added | Bruno Stonek | This question has appeared in MSE a few months ago: math.stackexchange.com/questions/102820/… | |
| Jun 21, 2012 at 15:48 | comment | added | Buschi Sergio | About Maria Voloshina proof, that injectivity of $f: F[a, b]\to F[c, d]:a \mapsto c,\ b\mapsto d\cdot c\cdot d^{-1} $ follow from $\forall n:P(n)$, where $P(n)$:: the (reducted) word f(w) end with $c$ or by $d^{−1}$ for each (reducted) word $w\in F[a,b]$ of lenght $n$ ($n>0$). And $\forall n>0:P(n)$ follow easly by induction. | |
| Jun 21, 2012 at 15:20 | answer | added | Andreas Thom | timeline score: 17 | |
| Jun 21, 2012 at 14:41 | answer | added | Tom Goodwillie | timeline score: 5 | |
| Jun 21, 2012 at 14:16 | comment | added | François G. Dorais | That's a nice proof! Since it is short, it could be copied as an answer below (with proper attribution) so it is easier to find and cite... | |
| Jun 21, 2012 at 14:06 | comment | added | Lee Mosher | And sweet, definitely short and sweet. | |
| Jun 21, 2012 at 13:52 | comment | added | user2035 | Google gives zimmer.csufresno.edu/~mnogin/talks/regAMSapril2004.pdf which may not be formally published, but is definitely short. | |
| Jun 21, 2012 at 13:45 | history | asked | Michael Barr | CC BY-SA 3.0 |