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SUMMARY:Manjil Saikia (Cardiff University)
DTSTART:20200923T053000Z
DTEND:20200923T063000Z
DTSTAMP:20260423T021355Z
UID:CATGT/9
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/CATGT/9/">Re
 fined enumeration of symmetry classes of Alternating Sign Matrices</a>\nby
  Manjil Saikia (Cardiff University) as part of Applications of Combinatori
 cs in Algebra\, Topology and Graph Theory\n\n\nAbstract\nThe sequence $1\,
 1\,2\,7\,42\,429\, \\ldots$ counts several combinatorial objects\, some of
  which I will describe in this talk. The major focus would be one of these
  objects\, alternating sign matrices (ASMs). ASMs are square matrices with
  entries in the set $\\{0\,1\,-1\\}$\, where non-zero entries alternate in
  sign along rows and columns\, with all row and column sums being 1. I wil
 l discuss some questions that are central to the theme of ASMs\, mainly de
 aling with their enumeration. In particular we shall prove some conjecture
 s of Fischer\, Robbins and Duchon. This is based on joint work with Ilse F
 ischer.\n
LOCATION:https://researchseminars.org/talk/CATGT/9/
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