Displaying all lectures given by: Ben Webster

PIRSA:20060024  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Welcome and Opening Remarks
Speaker(s): Ben Webster
Date: 22/06/2020 - 10:15 am

PIRSA:19090115  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Tilting bundles and 3-dimensional field theory
Speaker(s): Ben Webster
Abstract: The category of coherent sheaves on an interesting variety X has an extremely annoying property: does not have enough projectives, so it cannot be equivalent to the category of modules over an algebra. However, if you pass to the derived category, this defect can be fixed in many interesting cases, ... read more
Date: 26/09/2019 - 4:30 pm

PIRSA:19040120  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Mathematical hints of 3-d mirror symmetry
Speaker(s): Ben Webster
Abstract: This is practice for a talk at Berkeley, so it will involve explaining stuff many people here probably already know.  I'll try to summarize what I've learned about 3 dimensional N=4 supersymmetric quantum field theories, their twists and how these manifest in terms of interesting objects in... read more
Date: 15/04/2019 - 11:00 am

PIRSA:17090065  ( MP4 Medium Res , MP3 , PDF ) Which Format?
An extended category for the BFN construction
Speaker(s): Ben Webster
Abstract: I'll do my best to explain my approach to the BFN construction of (quantum) Coulomb branches.  This approach is based on viewing the BFN algebra as an endomorphism algebra in a larger category that's easier to present (and which we can draw some pretty pictures for).  In particular... read more
Date: 25/09/2017 - 2:00 pm
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