Seminars and Colloquia
| Everytopic Seminar Fridays 1:40-3 pm Goldsmith 226 |
Topology Seminar Tuesdays 1:40-3 pm Goldsmith 226. |
Graduate Student Seminar Thursdays 3-4 pm Goldsmith 117. |
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Brandeis-Harvard-MIT-Northeastern Colloquium Thursday 4:30-5:30 |
New Directions Lecture Series Thursday 2:10-3 Goldsmith 317 |
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Eisenbud Lecture Series in Mathematics and Physics featuring Dan Freed of the University of Texas, Austin. April 13-15, 2009.
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A full listing of seminars may be found on the Mathematics Calendar on MyBrandeis.
Seminars in the next 10 days:
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Tuesday, November 10, 2009
Topology Seminar--Daniel Moskovich (RIMS, Kyoto)
1:40 pm - 3:00 pm
Goldsmith 226
Title: Surgery and bordism for coloured knots
Abstract: For a group G, a G coloured knot is an oriented knot K together with a representation of its knot group π1(S3-K) onto G. We consider the question of how to determine whether or not two G coloured knots are related by moves analogous to crossing changes for knots. For a certain class of finite metabelian groups, we can show that two G-coloured knots are thus related if and only if they are in the same relative bordism class. Motivations include finding G symmetric surgery descriptions of manifolds, using Dehn surgery techniques to investigate twisted Alexander polynomials, finding new invariants of G coloured knots, and surgery presentations of covering links in non-abelian covering spaces. -
Thursday, November 12, 2009
2:10 pm - 3:00 pm
Goldsmith 317
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Friday, November 13, 2009
1:40 pm - 3:00 pm
Goldsmith 226
Seminar Schedule
Description: The Everytopic Seminar is an amalgamation of the Fellowship of the Ring Seminar and the Everyperson Seminar. The talks will be 80 minutes, with the first half of the talk given in a colloquium style, which will be accessible to faculty and graduate students from any field of mathematics, and allow everyone to grasp the content and significance of the theorem(s) being discussed. The last 40 minutes will be in the style of a research seminar, providing the audience with a deeper understanding of the results as well as some details of the proof. -
Tuesday, November 17, 2009
Topology Seminar--Kent Orr (Indiana University)
1:40 pm - 3:00 pm
Goldsmith 226
Title: L2 methods, knot concordance, localization, and amenable groups.
Abstract: L2 signatures play a central role in the study of knot concordance, a classical relation on knots closely allied with deep considerations in singularity theory and the classification of 4-manifolds. In collaboration with Jae Choon Cha, and using a new approach which subsumes past results, we extend the above techniques to the related problem of classifying manifolds up to homology cobordism, and significantly extend key results concerning invariance of L2 signatures and betti numbers. We exhibit new examples of homology equivalent manifolds in low and high dimensions which are not homology cobordant. Many of these results involve groups with torsion, unassailable via prior tools. -
Thursday, November 19, 2009
2:10 pm - 3:00 pm
Goldsmith 317
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Friday, November 20, 2009
1:40 pm - 3:00 pm
Goldsmith 226
Seminar Schedule
Description: The Everytopic Seminar is an amalgamation of the Fellowship of the Ring Seminar and the Everyperson Seminar. The talks will be 80 minutes, with the first half of the talk given in a colloquium style, which will be accessible to faculty and graduate students from any field of mathematics, and allow everyone to grasp the content and significance of the theorem(s) being discussed. The last 40 minutes will be in the style of a research seminar, providing the audience with a deeper understanding of the results as well as some details of the proof.