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SUMMARY:Three notions of symmetric monoidal 2-category - Nick Gurski (Univ
 ersity of Sheffield).
DTSTART:20141125T141500Z
DTEND:20141125T153000Z
UID:TALK56436@talks.cam.ac.uk
CONTACT:Dr Ignacio Lopez Franco
DESCRIPTION:The definition of a symmetric monoidal bicategory is long and 
 involved\, due to its completely general nature. I will discuss\nthree str
 icter definitions. The first is that of a quasi-strict symmetric monoidal 
 2-category due to Chris Schommer-Pries.\nThe second is the logically equiv
 alent\, but conceptually different notion of a permutative Gray-monoid. Th
 e third notion\nis that of a permutative 2-category which\, while not equi
 valent to the first two notions\, arises naturally in topological\napplica
 tions.  This is joint work with Niles Johnson and Ang\\'elica Osorno.
LOCATION:MR5\, Centre for Mathematical Sciences
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