Xavier Goaoc, Limits of order types

Limits of order types
Xavier Goaoc
Université Paris-Est, Marne-la-Vallée, France
2017/09/29 Fri 4PM-5PM (Room 3433, Bldg. E6-1)
The limits of converging sequences of graphs are natural objects from extremal graph theory that are also representable as measure-theoretic objects (graphons) or as algebraic objects (flag algebra homomorphisms). I will give an introduction to this theory via a geometric relative: its adaptation from graphs to a combinatorial encoding of planar point sets. This is based on joint work with Alfredo Hubard, Rémi de Joannis de Verclos, Jean-Sébastien Sereni and Jan Volec (http://drops.dagstuhl.de/opus/volltexte/2015/5126/). The talk will not assume any specific knowledge.


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