GENTLE+DÉCOLLAGE

Category: 2025/2026

  • Courant algebroids and generating operators, by A. Alexeev

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    20 Apr 2026, 14:00 CET. Talk by Anton Alexeev. Abstract: Courant algebroids were defined in 1997 by Liu-Weinstein-Xu. This theory gained momentum in letters of Severa to Weinstein circulated between 1998 and 2001. In 1999, Roytenberg in his PhD thesis gave an interpretation of Courant brackets as derived brackets defined by a certain cubic generating…

  • Symplectic Calabi-Yau manifolds, examples, questions and applications, by J. Fine

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    19 Mar 2026, 14:00 CET. Talk by Joel Fine. Abstract: In the first half of the talk I will explain what symplectic Calabi-Yau manifolds are, describe some open questions about them, and give a way to construct examples. In the second half of the talk I will describe some applications of these examples to the…

  • 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.