Topology Seminar
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Mon, 19/01/2009 15:45 |
Yoshikata Kida (Tohoku) |
Topology Seminar  |
L3 |
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Mon, 26/01/2009 15:45 |
Karen Vogtmann (Cornell) |
Topology Seminar |
L3 |
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Mon, 02/02/2009 15:45 |
Panos Papozoglou (Oxford) |
Topology Seminar |
L3 |
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Mon, 09/02/2009 15:45 |
TBA |
Topology Seminar |
L3 |
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Mon, 16/02/2009 15:45 |
Alain Valette (Universite de Neuchatel) |
Topology Seminar |
L3 |
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Mon, 23/02/2009 15:45 |
Neil Strickland (Sheffield) |
Topology Seminar |
L3 |
| There is a well-known relationship between the theory of formal group schemes and stable homotopy theory, with Ravenel's chromatic filtration and the nilpotence theorem of Hopkins, Devinatz and Smith playing a central role. It is also familiar that one can sometimes get a more geometric understanding of homotopical phenomena by examining how they interact with group actions. In this talk we will explore this interaction from the chromatic point of view. | |||
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Mon, 02/03/2009 15:45 |
Jacob Rasmussen (Cambridge) |
Topology Seminar |
L3 |
| The notion of a sutured 3-manifold was introduced by Gabai. It is a powerful tool in 3-dimensional topology. A few years ago, Andras Juhasz defined an invariant of sutured manifolds called sutured Floer homology. I'll discuss a simpler invariant obtained by taking the Euler characteristic of this theory. This invariant turns out to have many properties in common with the Alexander polynomial. Joint work with Stefan Friedl and Andras Juhasz. | |||
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Mon, 09/03/2009 15:45 |
Marc Lackenby (Oxford) |
Topology Seminar |
L3 |
| I will outline the proof of two old conjectures of Cameron Gordon. The first states that the maximal number of exceptional Dehn surgeries on a 1-cusped hyperbolic 3-manifold is 10. The second states the maximal distance between exceptional Dehn surgeries on a 1-cusped hyperbolic 3-manifold is 8. The proof uses a combination of new geometric techniques and rigorous computer-assisted calculations. This is joint work with Rob Meyerhoff. | |||
