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Logarithmic structures, Artin fans, and the moduli stack of tropical curves Ulirsch, Martin
Description
Artin fans are logarithmic algebraic stacks that are logarithmically \'etale over the base field. Despite their seemingly abstract definition, the geometry of Artin fans can be described completely in terms of combinatorial objects, so called Kato stacks, a stack-theoretic generalization of K. Kato s notion of a fan. In this talk, following a rapid introduction to logarithmic geometry from a modular point of view, I am going to give an expository account of the theory of Artin fans and explain how Thuillier's non-Archimedean skeleton of a toroidal embedding can be understood as an analytification of the associated Artin fan. In the special case of a toric variety, this simply reduces to the fact that the Kajiwara-Payne tropicalization map is a non-Archimedean analytic stack quotient. Finally, Artin fans also provide the motivation for an ongoing joint project with R. Cavalieri, M. Chan, and J. Wise, in which we develop a stack-theoretic framework for the study of tropical moduli spaces.
Item Metadata
Title |
Logarithmic structures, Artin fans, and the moduli stack of tropical curves
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Creator | |
Publisher |
Banff International Research Station for Mathematical Innovation and Discovery
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Date Issued |
2016-05-02T15:00
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Description |
Artin fans are logarithmic algebraic stacks that are
logarithmically \'etale over the base field. Despite their seemingly
abstract definition, the geometry of Artin fans can be described
completely in terms of combinatorial objects, so called Kato stacks, a
stack-theoretic generalization of K. Kato s notion of a fan. In this talk,
following a rapid introduction to logarithmic geometry from a modular
point of view, I am going to give an expository account of the theory of
Artin fans and explain how Thuillier's non-Archimedean skeleton of a
toroidal embedding can be understood as an analytification of the
associated Artin fan. In the special case of a toric variety, this simply
reduces to the fact that the Kajiwara-Payne tropicalization map is a
non-Archimedean analytic stack quotient. Finally, Artin fans also provide
the motivation for an ongoing joint project with R. Cavalieri, M. Chan, and
J. Wise, in which we develop a stack-theoretic framework for the study of
tropical moduli spaces.
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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: University of Bonn
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Series | |
Date Available |
2017-02-08
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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 |
10.14288/1.0320842
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URI | |
Affiliation | |
Peer Review Status |
Unreviewed
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Scholarly Level |
Postdoctoral
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Rights URI | |
Aggregated Source Repository |
DSpace
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Item Media
Item Citations and Data
Rights
Attribution-NonCommercial-NoDerivatives 4.0 International