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Compact generation of derived categories of stacks Rydh, David
Description
I will give a survey over recent results on derived categories of algebraic stacks with an emphasis on compact generation. In a loose sense, compact objects in the derived category is a replacement for ample line bundles on projective schemes. They also generalize vector bundles but are more flexible. From a different perspective, compact objects are like the coherent sheaves among the quasi-coherent sheaves. I will focus on three questions: (1) When are perfect complexes compact? (2) When is the derived category compactly generated? (3) When are complexes of quasi-coherent sheaves good enough? For schemes, these questions are well understood by work of Thomason, Neeman, Bokstedt, Bondal, Van den Bergh and Lipman. For stacks, the picture is not complete yet but there are satisfactory partial results by Ben-Zvi, Francis, Nadler, Toen, Antieau, Gepner, Lurie, Drinfeld, Gaitsgory, Hall, Neeman and the speaker.
Item Metadata
Title |
Compact generation of derived categories of stacks
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Creator | |
Publisher |
Banff International Research Station for Mathematical Innovation and Discovery
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Date Issued |
2016-06-21T15:31
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Description |
I will give a survey over recent results on derived categories of algebraic stacks with an emphasis on compact generation.
In a loose sense, compact objects in the derived category is a replacement for ample line bundles on projective schemes. They also generalize vector bundles but are more flexible. From a different perspective, compact objects are like the coherent sheaves among the quasi-coherent sheaves.
I will focus on three questions:
(1) When are perfect complexes compact?
(2) When is the derived category compactly generated?
(3) When are complexes of quasi-coherent sheaves good enough?
For schemes, these questions are well understood by work of Thomason, Neeman, Bokstedt, Bondal, Van den Bergh and Lipman. For stacks, the picture is not complete yet but there are satisfactory partial results by Ben-Zvi, Francis, Nadler, Toen, Antieau, Gepner, Lurie, Drinfeld, Gaitsgory, Hall, Neeman and the speaker.
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Extent |
63 minutes
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Subject | |
Type | |
File Format |
video/mp4
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Language |
eng
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Notes |
Author affiliation: Royal Institute of Technology (KTH)
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Series | |
Date Available |
2016-12-21
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Provider |
Vancouver : University of British Columbia Library
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Rights |
Attribution-NonCommercial-NoDerivatives 4.0 International
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DOI |
10.14288/1.0340411
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URI | |
Affiliation | |
Peer Review Status |
Unreviewed
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Scholarly Level |
Faculty
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Rights URI | |
Aggregated Source Repository |
DSpace
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Item Citations and Data
Rights
Attribution-NonCommercial-NoDerivatives 4.0 International