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Oct 8, 2023 at 9:09 comment added Ali Taghavi @Alejandro The symplectic version of centralizer problem is also a related question. Plz see the last lines of this post mathoverflow.net/questions/193650/…
May 4, 2023 at 5:01 history edited YCor CC BY-SA 4.0
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Apr 5, 2023 at 13:43 comment added Aleksander Skenderi @Alejandro thank you very much for the reference!
Apr 5, 2023 at 13:42 comment added Alejandro As far as I know, the best characterization of the centralizer of generic area-preserving diffeomorphisms of the sphere $\mathbb{S}^2$ so far is given by the paper of Lizzie Burslem ams.org/journals/proc/2005-133-04/S0002-9939-04-07675-0/…
Apr 5, 2023 at 12:53 history edited Aleksander Skenderi CC BY-SA 4.0
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Apr 5, 2023 at 12:42 comment added YCor Unimportant remark: The choice of the letter $\omega$ in $\mathrm{Diff}_\omega$ might be misread as analytic diffeomorphisms.
Apr 5, 2023 at 12:33 history edited Aleksander Skenderi CC BY-SA 4.0
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Apr 5, 2023 at 12:28 comment added Aleksander Skenderi @MartinM.W. Good point. I am in fact interested primarily in the case of the 2-sphere, so I can specify this.
Apr 5, 2023 at 11:55 comment added Asaf @MartinM.W. the rotation group is still cyclic (or more accurately, monothetic) as it is the closure of the cyclic group generated by one element (any irrational rotation).
Apr 5, 2023 at 10:53 comment added Martin M. W. A very minor point: if $M$ is the circle, then I think volume-preserving diffeomorphisms will just be the rotations, so in fact they all commute. You may want to specify that $M$ has dimension at least two.
Apr 5, 2023 at 0:43 history edited YCor CC BY-SA 4.0
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Apr 4, 2023 at 23:32 history edited Aleksander Skenderi CC BY-SA 4.0
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S Apr 4, 2023 at 23:32 review First questions
Apr 5, 2023 at 0:15
S Apr 4, 2023 at 23:32 history asked Aleksander Skenderi CC BY-SA 4.0