Jaqueline Godoy Mesquita, University of Brasilia
Averaging principles and stability in the context of functional differential equations
Monday, June 17 2024, at 15:15
Sala Consiglio, settimo piano, Dipartimento di Matematica, Politecnico di Milano | |
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Abbas Moameni, Carleton University, Ottawa
Stratified Monge-Kantorovich optimal transport problems, structure and the uniqueness of optimal transport plans.
Monday, May 06 2024, at 16:30
Aula seminari MOX, sesto piano, Dipartimento di Matematica, Politecnico di Milano | |
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François Delarue , Université Côte d'Azur
Mean field control and games. Some prospects
Thursday, April 18 2024, at 14:00
aula U5 RATIO-3014 Dip di Matematica e Applicazioni - Università Milano - Bicocca | |
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Corinna Ulcigrai, Institut für Mathematik - Universität Zürich
Periodic surfaces and deterministic random walks: dynamics between geometry and probability
Thursday, March 21 2024, at 14:30
aula U5 RATIO-3014 Università Milano - Bicocca | |
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Marc Levine, Universität Duisburg-Essen
DT invariants of smooth projective threefolds: classical, quadratic and real
Wednesday, February 21 2024, at 17:00
Sala di Rappresentanza del Dipartimento di Matematica di via Saldini |
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Abstract
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Let X be a smooth projective 3-fold over the complex
numbers. Following work of Thomas, Behrend-Fantechi, and others, one
has a virtual fundamental class in the Chow group of 0-cycles on the
Hilbert scheme of dimension 0, length n subschemes of X, the degree of
which is the nth Donaldson-Thomas invariant of X
Now take X over an arbitrary field k. We have developed a construction
of virtual fundamental classes with values in an arbitrary motivic
cohomology theory. An example of such, a ``quadratic'' analog of the
Chow groups, is the cohomology of the sheaf of Witt rings, which leads
to a refinement of the classical DT-invariants to quadratic
DT-invariants with values in the Witt ring of quadratic forms over k.
We will discuss some developments and conjectures for these refined DT
invariants, including some computations of the signature of these
invariants due to Anneloes Viergever. |
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Jiri Neustupa, Czech Academy of Sciences, Institute of Mathematics, Prague
On steady solutions to the MHD equations with inhomogeneous generalized impermeability boundary conditions for the magnetic field
Monday, February 19 2024, at 11:30
Sala di Rappresentanza del Dipartimento di Matematica di via Saldini | |
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