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SUMMARY:Greg Bell (UNC Greensboro)
DTSTART:20211109T140000Z
DTEND:20211109T160000Z
DTSTAMP:20260423T022932Z
UID:WienGAGT/2
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/WienGAGT/2/"
 >Property A and duality in linear programming</a>\nby Greg Bell (UNC Green
 sboro) as part of Vienna Geometry and Analysis on Groups Seminar\n\n\nAbst
 ract\nYu introduced property A in 2000 in his work on the Novikov conjectu
 re as a means to guarantee a uniform embedding into Hilbert space. The cla
 ss of groups and metric spaces with property A is vast and includes spaces
  with finite asymptotic dimension or finite decomposition complexity\, amo
 ng others. We reduce property A to a sequence of linear programming optimi
 zation problems on finite graphs. We explore the dual problem\, which prov
 ides a means to show that a graph fails to have property A. As consequence
 s\, we examine the difference between graphs with expanders and graphs wit
 hout property A\, we recover theorems of Willett and Nowak concerning grap
 hs without property A\, and arrive at a natural notion of mean property A.
  This is joint work with Andrzej Nagórko\, University of Warsaw.\n
LOCATION:https://researchseminars.org/talk/WienGAGT/2/
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