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DTSTART:20240310T070000
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DTSTART:20231105T060000
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DTSTART;TZID=America/Toronto:20240829T140000
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URL:https://uwaterloo.ca/pure-mathematics/events/analysis-seminar-183
SUMMARY:Analysis Seminar
CLASS:PUBLIC
DESCRIPTION:MATHIAS SONNLEITNER\, UNIVERSITY OF PASSAU\n\nCovering complete
 ly symmetric convex bodies\n\nA completely symmetric convex body is invari
 ant under reflections or\npermutations of coordinates. We can bound its me
 tric entropy numbers\nand consequently its mean width using sparse approxi
 mation. We provide\nan extension to quasi-convex bodies and present an app
 lication to unit\nballs of Lorentz spaces\, where we can provide a complet
 e picture of\nthe rich behavior of entropy numbers. These spaces are compa
 tible with\nsparse approximation and arise from interpolation of Lebesgue 
 sequence\nspaces\, for which a similar result is by now classical. Based o
 n joint\nwork with J. Prochno and J. Vybiral.\n\nMC5403
DTSTAMP:20260504T234147Z
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