Banach May 2021

banach@mathdept.okstate.edu

2 participants
4 discussions

Announcement of a Talk by Harrison Gaebler
by Bentuo Zheng (bzheng) 26 May '21

26 May '21

Hello, The next Banach spaces webinar is on Friday May 14 at 9AM Central time. Please join us at https://unt.zoom.us/j/83807914306 Speaker: Harrison Gaebler, University of Kansas Title: Asymptotic Geometry of Banach Spaces that have a Well-Behaved Riemann Integral Abstract: Banach spaces for which Riemann integrability implies Lebesgue almost everywhere continuity are said to have the Property of Lebesgue, or to be ``PL-spaces." It is an open problem to derive a full characterization of PL-spaces. In this talk, I will first give a brief overview of Riemann and Darboux integrability for Banach-valued functions, and I will then introduce the Property of Lebesgue with some relevant examples. I will next show how the Property of Lebesgue is connected to the asymptotic geometry (both global and local) of the underlying Banach space, and I will present three new results in this direction that are to appear later this year in Real Analysis Exchange. Finally, I will discuss two possibilities for future research on characterizing PL-spaces, and a connection between the Property of Lebesgue and the distortion of the unit sphere as well. For more information about the past and future talks, and videos please visit the webinar website http://www.math.unt.edu/~bunyamin/banach

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Talk Annoucement
by Bentuo Zheng (bzheng) 20 May '21

20 May '21

Hello, The next Banach spaces webinar is on Friday May 21 at 9AM Central time. Please join us at https://unt.zoom.us/j/83807914306 Speaker: Hugh Wark (York, England) Title: Equilateral sets in large Banach spaces Abstract: A subset of a Banach space is called equilateral if the distances between any two of its distinct points are the same. In this talk it will be shown that there exist non separable Banach spaces with no uncountable equilateral sets and indeed non separable Banach spaces with no infinite equilateral sets. For more information about the past and future talks, and videos please visit the webinar website http://www.math.unt.edu/~bunyamin/banach

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Announcement
by Bentuo Zheng (bzheng) 11 May '21

11 May '21

Dear Subscribers, I added a link to a documentary movie about Stefan Banach (suggested by Per Enflo). https://bentuo.wixsite.com/Banach Best regards, Bentuo Zheng

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Banach spaces webinar on Friday May 7 by Jordi López Abad (UNED)
by Sari, Bunyamin 06 May '21

06 May '21

Hello, The next Banach spaces webinar is on Friday May 7 at 9AM Central time. Please join us at https://unt.zoom.us/j/83807914306 Speaker: Jordi López Abad, UNED Title: A note on Pelczynski's universal basis space Abstract: We prove that the isometry group of a renorming of the Pelczynski's universal basis space is extremely amenable. To do this, we see that the class of finite dimensional normed spaces is a complemented Fraïssé class with the approximate Ramsey property. This is a joint work with Jamal Kawach. For more information about the past and future talks, and videos please visit the webinar website http://www.math.unt.edu/~bunyamin/banach Thank you, and best regards, Bunyamin Sari

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Banach May 2021