Timeline for What is the group of automorphisms of $l^{\infty}$?

6 events

when toggle format	what		by	license	comment
May 5, 2016 at 18:43	history	edited	John Baez	CC BY-SA 3.0	fixed mistake about all characters coming from integers
May 5, 2016 at 18:36	history	edited	John Baez	CC BY-SA 3.0	fixed mistake about all characters coming from integers
May 5, 2016 at 18:19	comment	added	John Baez		Thanks, you're right of course! Let me fix my answer just to avoid confusion.
May 2, 2016 at 5:57	comment	added	Uri Bader		Indeed, characters supported on the boundary of $\mathbb{Z}$ in the Stone Ceck compactification will not be weak* continuous.
May 2, 2016 at 4:51	comment	added	Yemon Choi		In the Cstar context, the characters of $\ell^\infty({\bf Z})$ are NOT all given by evaluation at integers -- rather, they correspond to points of the Stone-Cech compactification. I suspect that in your second paragraph you want to restrict attention to weak-star continuous characters, which are all of the form you state.
May 2, 2016 at 4:44	history	answered	John Baez	CC BY-SA 3.0