Description: This is a year long course
in algebraic topology. Topics to be covered may include: Cohomology,
universal coefficient theorem, Kunneth formula, Poincare duality.
deRham theory, homotopy theory, cellular and simplicial approximations,
Whitehead and Hurewicz theorems, fiber bundles, Postnikov
towers, obstruction theory, characteristic classes and spectral
sequences.
Description: The goal is to give an introduction into newly emerging theory of cluster algebras (mostly from the point of view of Poisson structures and Integrable systems).
Description:Physicists have many examples of gauge theories that are very different yet, in some limit, yield equivalent quantum field theories. In mathematics, one example is now well-understood: Taubes' proved that a certain limit of the Seiberg-Witten equations concentrate (as solutions of a non-linear PDE) along sets that are completely characterized by Gromov-Witten invariants (solutions of a completely different PDE). The course will introduce both sides of this correspondence, including the needed geometry and analysis, and examine the concentration phenomenon.
1. Complex curves and Deligne-Mumford space
2. J-holomorphic maps and Gromov-Witten invariants
3. Seiberg-Witten equations and their moduli space
4. Taubes' concentration phenomenon and the proof that SW=Gr.
If time permits, we will finish with an introduction to the "Embedded Contact Homology" of Huchings and Taubes.
Description:The object of study in this course will be the Seiberg-Witten version of Floer homology. No previous knowledge of 4-manifolds, Seiberg-Witten invariants, or any type of Floer homology will be required, but of course, those of you just beginning with this will need to put in a bit of work. The text will be 'Monopoles and Three manifolds', by Kronheimer and Mrowka (Chapter 0 and parts of 7,9,10) My current idea for a course outline is:
1. Review of homology via Morse theory, connections, spin^c-structures, basic Seiberg-Witten theory
2. Properties of Seiberg-Witten invariants of 4-manifolds
3. Monopole Floer homology of 3-manifolds
4. Gluing theorems and calculations of Seiberg-Witten invariants using monopole Floer homology and some applications
If there is enough time we will also study Kronheimer and Mrowka's paper on excision.
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