GENTLE+DÉCOLLAGE

Category: seminar

  • TBA, by A. Alexeev

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    20 Apr 2026, 14:00 CET. Talk by Anton Alexeev. Abstract: TBA.

  • TBA, by J. Fine

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    19 Mar 2026, 14:00 CET. Talk by Joel Fine. Abstract: TBA.

  • Self-crossing stable generalized complex structures, by A. Witte

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    19 Feb 2026, 14:00 CET. Talk by Aldo Witte. Abstract: The first example of a manifold which admits a generalized complex structure, but neither a complex or symplectic structure was 3CP2#\bar{19 CP2} which was constructed by Cavalcanti and Gualtieri. This structure is a very special example of a GC structure called stable: It has symplectic…

  • Moduli spaces of spacefilling branes in symplectic 4-manifolds, by M. Zambon

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    29 Jan 2026, 14:00 CET. Talk by Marco Zambon. Abstract: On a symplectic manifold (M, ω), a spacefilling brane structure is a closed 2-form F which determines a complex structure, with respect to which F + iω is holomorphic symplectic. For holomorphic symplectic compact Kähler 4-manifolds, we show that the moduli space of spacefilling branes…

  • Gugenheim’s A-infinity de Rham theorem and higher holonomies, by C. Arias-Abad

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    17 Dec 2025, 14:00 CET. Talk by Camilo Arias-Abad. Abstract: The de-Rham map, that takes a differential form to a singular cochain by integration over chains, is not an algebra map. It should not be, since differential forms are commutative but singular cochains are not. However, the map induced in cohomology is an algebra map.…

  • A brief introduction to deformation quantization, by H. Bursztyn

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    11 Dec 2025, 15:00 CET. Talk by Henrique Bursztyn. Abstract: This (informal) talk will introduce and discuss some aspects of deformation quantization, including its motivation, basic examples, and existence and classification of star products. Time permitting, I will also comment on the connections with “B-fields” and Morita equivalence.

  • Dirac products and concurring Dirac structures, by D. Martínez Torres

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    20 May 2025, 14:00 CET. Talk by David Martínez Torres. Abstract: We discuss two dual canonical operations on Dirac structures L and R, the tangent and the cotangent product. The tangent product, also known as tensor product, if smooth is always Dirac, and we will describe how its characteristic foliation relates to those of L…

  • The Fukaya category of a log symplectic surface, by C. Kirchhoff-Lukat

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    25 Mar 2025, 14:00 CET. Talk by Charlotte Kirchhoff-Lukat. Abstract: Floer theory and Fukaya categories constitute powerful invariants of symplectic manifolds. As a first step in the effort to extend these techniques to Poisson structures with degeneracies, I will present the construction of the Fukaya category for log symplectic Poisson structures on oriented surfaces, with…

  • Projective to Einstein Correspondence, by M. Dunajski

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    11 Mar 2025, 15:00 CET (note the unusual time). Talk by Maciej Dunajski. Abstract: I shall review various ways in which an affine connection on a manifold M can be lifted to a conformal structure on TM. I shall focus on the construction in which there is a preferred metric in this conformal structure which…

  • What is the h-principle and how may it be relevant to generalized geometry?, by Á. del Pino

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    17 Dec 2024. 14:00 CET. Talk by Álvaro del Pino. Abstract: The h-principle is the subfield of Differential Topology dedicated to the classification problem for geometric structures on manifolds, up to homotopy. Statements in h-principle are often of the form: “The space of structures of type X is weakly homotopy equivalent to some other space…