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Algebraic versus geometric complexity in homotopy groups Manin, Fedor
Description
Given a metric space X and an element α ∈ πn(X), how does the minimal geometric complexity of a representative of kα grow as a function of k? If we can find a representative simpler than the ”obvious” one, as quantified by measures such as Lipschitz constant or volume, we say, by analogy to the π1 case, that α is distorted. Asymptotically, distortion functions are topological invariants of nice compact spaces. For such spaces, we discuss various ways in which distortion can arise and establish conditions on X under which homotopy elements are or are not distorted. Methods include rational homotopy theory, filling functions, and L∞ cohomology.
Item Metadata
| Title |
Algebraic versus geometric complexity in homotopy groups
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| Creator | |
| Publisher |
Banff International Research Station for Mathematical Innovation and Discovery
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| Date Issued |
2013-08-05
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| Description |
Given a metric space X and an element α ∈ πn(X), how does the minimal geometric complexity of a representative of kα grow as a function of k? If we can find a representative simpler than the ”obvious” one, as quantified by measures such as Lipschitz constant or volume, we say, by analogy to the π1 case, that α is distorted. Asymptotically, distortion functions are topological invariants of nice compact spaces. For such spaces, we discuss various ways in which distortion can arise and establish conditions on X under which homotopy elements are or are not distorted. Methods include rational homotopy theory, filling functions, and L∞ cohomology.
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| Extent |
48 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 Chicago
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| Series | |
| Date Available |
2014-08-06
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| Provider |
Vancouver : University of British Columbia Library
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| Rights |
Attribution-NonCommercial-NoDerivs 2.5 Canada
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| DOI |
10.14288/1.0043475
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| URI | |
| Affiliation | |
| Peer Review Status |
Unreviewed
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| Scholarly Level |
Graduate
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| Rights URI | |
| Aggregated Source Repository |
DSpace
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Item Media
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Rights
Attribution-NonCommercial-NoDerivs 2.5 Canada