Timeline for Mapping Class Groups of Punctured Surfaces (and maybe Billiards)
Current License: CC BY-SA 3.0
4 events
| when toggle format | what | by | license | comment | |
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| Feb 12, 2014 at 9:46 | comment | added | Lucien | Concerning the second exact sequence: when $g=1$ and $n\geq 2$ (or when $g=0$ and $n\geq 3$), it is necessary to replace $B(g,n)$ by its quotient by its (non-trivial) center to still have the exactness (cf. Theorem 4.2 p. 152 in "Braids, Links and MCGs" by Birman). | |
| Sep 1, 2013 at 15:31 | history | edited | Lee Mosher | CC BY-SA 3.0 |
fixed the subscript in SL_2 Z
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| Dec 30, 2009 at 0:39 | vote | accept | john mangual | ||
| Dec 22, 2009 at 3:07 | history | answered | Andy Putman | CC BY-SA 2.5 |