Talk:Thurston norm

First draft

As it stands this is incomplete. Stuff I'd like to add:

• a description of Agol's work on RFRS and virtual fibrations, in [1]
• the relation with Alexander polynomials found by McMullen and ameliorated by Harvey (see [2]))

jraimbau (talk) 10:00, 8 July 2016 (UTC)

Euler characteristic

Isn't the Euler characteristic of a sphere 2? Why is it 0 in this case? Or do I miss something? oh wait, $\chi _{-}(S^{2})=\max(0,-2)=0$... Wilson868 (talk) 10:13, 8 June 2019 (UTC)