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Nov 16, 2022 at 8:47 history edited Martin Sleziak CC BY-SA 4.0
http -> https (the question was bumped anyway)
Nov 11, 2014 at 9:40 history edited Andreas Thom CC BY-SA 3.0
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Nov 11, 2014 at 7:35 history edited Andreas Thom CC BY-SA 3.0
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Jun 13, 2014 at 8:08 comment added Andreas Thom $Aut(F_2)$ and $Aut(F_3)$ are known not to have Kazhdan's property $(T)$. If $Aut(F_n)$ for high $n$ would have Kazhdan's property $(T)$, this would explain why the product replacement algorithm works so well -- this was explained in a paper by Alex Lubotzky and Igor Pak.
Jun 12, 2014 at 14:12 comment added Vladimir Why in particular $\mathrm{Aut}(F_4)$? is the answer known for $\mathrm{Aut}(F_2)$ and $\mathrm{Aut}(F_3)$?
S May 24, 2014 at 4:48 history suggested ThiKu CC BY-SA 3.0
two Typos corrected
May 24, 2014 at 4:30 review Suggested edits
S May 24, 2014 at 4:48
May 22, 2014 at 2:44 vote accept Narutaka OZAWA
May 22, 2014 at 2:43 comment added Narutaka OZAWA Fantastic. I accept it as an answer (so unfortunately I cannot accept Speyer's) and wish you good luck on Aut($F_4$)! BTW, I learned sometime ago that semidecidability of property (T) had been observed by Silberman. metric2011.wordpress.com/2011/03/02/…
May 21, 2014 at 16:43 history edited Andreas Thom CC BY-SA 3.0
added 91 characters in body
May 21, 2014 at 16:30 history answered Andreas Thom CC BY-SA 3.0