On critical behaviour in systems of Hamiltonian partial differential equations

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dc.contributor.areaMathematicsen_US
dc.contributor.authorDubrovin, Boris
dc.contributor.authorGrava, Tamara
dc.contributor.authorKlein, Christian
dc.contributor.authorMoro, Antonio
dc.date.accessioned2014-01-15T07:53:33Z
dc.date.available2014-01-15T07:53:33Z
dc.date.issued2014-01-15
dc.description.abstractWe study the critical behaviour of solutions to weakly dispersive Hamiltonian systems considered as perturbations of elliptic and hyperbolic systems of hydrodynamic type with two components. We argue that near the critical point of gradient catastrophe of the dispersionless system, the solutions to a suitable initial value problem for the perturbed equations are approximately described by particular solutions to the Painlev\'e-I (P$_I$) equation or its fourth order analogue P$_I^2$. As concrete examples we discuss nonlinear Schr\"odinger equations in the semiclassical limit. A numerical study of these cases provides strong evidence in support of the conjecture.en_US
dc.identifier.urihttps://openscience.sissa.it/handle/1963/7243
dc.language.isoenen_US
dc.miur.area1en_US
dc.publisherSISSAen_US
dc.subject.miurMAT/07 FISICA MATEMATICA
dc.titleOn critical behaviour in systems of Hamiltonian partial differential equationsen_US
dc.typePreprinten_US
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