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• 20:35, 1 November 2023 Verbovet talk contribs created page Seminar talk, 6 December 2023 (Created page with "{{Talk | speaker = Sergey Agafonov | title = Hexagonal circular 3-webs with polar curves of degree three | abstract = Lie sphere geometry describes circles on the unit sphere by polar points of these circles. Therefore a one parameter family of circles corresponds to a curve and a 3-web of circles, i.e. 3 foliations by circles, is fixed by 3 curves. We call the union of these curves the polar curve and show how analysis of the singular set of hexagonal 3-webs helps to cl...")