Seminars

  • 2020 Jun 01

    Combinatorics:

    Repeats every week every Monday until Mon Jun 29 2020 except Mon Apr 06 2020.
    11:00am to 1:00pm

    Location: 

    Manchester 110

    Speaker: TBA

    Title: TBA

    Abstract: TBA
  • 2020 May 28

    Basic Notions: Michael Tenkin "Resolution: classical, relative and weighted"

    4:00pm to 5:15pm

    Location: 

    Join Zoom Meeting https://huji.zoom.us/j/98768675115?pwd=WnZOZUpuVmpoNGkrYWQxanNVWkQzUT09,

    Until recently there was known an essentially unique way to resolve singularities of varieties of 
    characteristic zero in a canonical way (though there were different descriptions and proofs of correctness). 
    Recently a few advances happened -- 
    1) The algorithm was extended to varieties with log structures and even to morphisms -- This requires to consider 
    more general logarithmic blow ups and results in a stronger logarithmic canonicity of the algorithms even for resolution 
  • 2020 May 26

    Jon Aaronson (TAU) On mixing properties of infinite measure preserving transformations

    2:00pm to 3:00pm

    Abstract: I'll discuss  various  "ratio mixing"  properties
    of transformations preserving infinite measures e.g. "Krickeberg mixing" (based on the example in Hopf's 1936 book) & "rational weak mixing". I'll also introduce a new one connected to "tied down" renewal theory.

    Contains joint works with Hitoshi Nakada, Dalia Terhesiu & Toru Sera


    Join Zoom Meeting

    Meeting ID: 944 0148 4601
    Password: 8w24u0
  • 2020 May 25

    Combinatorics: Yuval Flimus (Technion)

    11:00am to 1:00pm

    Speaker: Yuval Flimus (Technion)


    Title: Oligarchy testing

    Abstract:
    Arrow's impossibility theorem states that the only voting rule satisfying certain natural requirements is a dictatorship.
    Gil Kalai showed that even if we relax some of these requirements so that they only hold with high probability, we are not getting genuine new voting rules.
    Arrow's theorem is just one of many paradoxes in social choice theory.

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