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UID:35103
DTSTAMP:20190818T044303Z
SUMMARY:Mathematical Physics & Integrable Systems seminar: Matteo Casati (University of Kent)
LOCATION:SR2, Sibson Building (SibSR2)
DESCRIPTION:The theory of Poisson vertex algebras, introduced by Barakat, De Sole and Kac to provide an algebraic framework for Hamiltonian PDEs, can be adapted to characterise Hamiltonian difference operators and evolutionary difference equations. Local and nonlocal "Multiplicative Poisson vertex algebras" have been very recently defined for this purpose by De Sole, Kac, Valeri and Wakimoto [arXiv:1806.05536 and arXiv:1809.01735]. In particular, the authors provide the classification of local Hamiltonian difference structures up to the order (-5,5). A remark on the integrable systems arising from the biHamiltonian pairs present in such a classification, originally due to Carpentier and observing that all the corresponding hierarchies are always equivalent to the Volterra chain is explained as a consequence of the triviality of the Poisson-Lichnerowicz cohomology of the constant Hamiltonian difference operator of order (-1,1) [arXiv:1810.08446]\n\n
DTSTART:20181204T140000Z
DTEND:20181204T150000Z
URL:
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