Universal L2-torsion for free-by-cyclic groups
50 mins 50 secs,
93.00 MB,
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About this item
Description: |
Kielak, D
Tuesday 20th June 2017 - 10:00 to 11:00 |
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Created: | 2017-07-18 09:31 |
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Collection: | Non-Positive Curvature Group Actions and Cohomology |
Publisher: | Isaac Newton Institute |
Copyright: | Kielak, D |
Language: | eng (English) |
Distribution: | World (downloadable) |
Explicit content: | No |
Aspect Ratio: | 16:9 |
Screencast: | No |
Bumper: | UCS Default |
Trailer: | UCS Default |
Abstract: | The universal L2-torsion, introduced by Friedl and Lück, allows for an extension of the Thurston norm from the setting of 3-manifolds to that of free-by-cyclic groups. We will discuss this extension, and show that this norm and the Alexander norm for F2-by-Z satisfy an inequality analogous to the one satisfied by the Thurston and Alexander norms on 3-manifolds. We will also discuss the relationship between the universal L2-torsion and the Bieri-Neumann-Strebel invariants.
This is joint work with Florian Funke. |
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MPEG-4 Video | 640x360 | 1.93 Mbits/sec | 738.43 MB | View | Download | |
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MP3 * | 44100 Hz | 249.78 kbits/sec | 93.00 MB | Listen | Download | |
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