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ETH Zurich - D-MATH - Research - Research Seminars - Symplectic Geometry Seminar 

Symplectic Geometry Seminar

Archive

Archive 1999-2009

Spring Semester 2012

Archive

SS 12 AS 11 SS 11 AS 10 SS 10 AS 09

Organiser(s)

Date	Speaker	Title	Time	Location
8-feb-2012 (wed)	Johannes Walcher	Arithmetic of normal functions and mirror symmetry	15:15-16:30	HG G 43
Abstract: Hodge theory, via mirror symmetry, has been making enumerative predictions about Gromov-Witten theory of Calabi-Yau threefolds. In particular, normal functions attached to algebraic cycles contain information about "numbers" of holomorphic discs ending on Lagrangian submanifolds. The most recent calculations concern algebraic cycles defined over finite extensions of the rational numbers. Still, there is convincing evidence (and a fair number of excuses) that the resulting invariants must admit an enumerative interpretation on the symplectic side. This interpretation will involve a new, arithmetic, twist of the di-logarithm: The D-logarithm. Speakers: Prof. Dr. Johannes Walcher (McGill University, Canada)
20-feb-2012 (mon)	Georgios Rizell	Knotted Legendrian surfaces with few Reeb chords	15:15-16:30	HG G 43
Abstract: For g > 0, we construct g + 1 Legendrian embeddings of a surface of genus g into standard contact R^5 which lie in pairwise distinct Legendrian isotopy classes and which all have g + 1 transverse Reeb chords (g + 1 is the minimal number of chords for Legendrian surfaces which admit a linearization of its Legendrian contact homology). We investigate these surfaces from the point-of-view of Legendrian contact homology as well as generating families. Gradient flow trees are used for computing the differentials. Speakers: Georgios Rizell (Uppsala University, Sweden)
27-feb-2012 (mon)	Paolo Rossi	Non equivariant contact homology revisited: a Poisson-Nijenhuis structure in SFT	15:15-16:30	HG G 43
Speakers: Paolo Rossi (University of Zurich)

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