Zobrazeno 1 - 10
of 18
pro vyhledávání: '"D. Catalano Ferraioli"'
Autor:
Michal Marvan, D. Catalano Ferraioli
Publikováno v:
Annali di Matematica Pura ed Applicata (1923 -). 199:1343-1380
We consider the equivalence problem of four-dimensional semi-Riemannian metrics with the two-dimensional Abelian Killing algebra. In the generic case we determine a semi-invariant frame and a fundamental set of first-order scalar differential invaria
Akademický článek
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Autor:
Giuseppe Gaeta, D. Catalano Ferraioli
We consider the theory of twisted symmetries of differential equations, in particular λ and μ -symmetries, and discuss their geometrical content. We focus on their interpretation in terms of gauge transformations on the one hand, and of coverings o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::265789fd56defe03623570cac7c7aefa
http://arxiv.org/abs/2002.02269
http://arxiv.org/abs/2002.02269
Publikováno v:
Journal of Mathematical Analysis and Applications. 446:1606-1631
For the pseudospherical surfaces described by a class of second order evolution equations, of the form z t = A ( x , t , z ) z 2 + B ( x , t , z , z 1 ) , we consider the problem of local isometric immersion into the 3-dimensional Euclidean space E 3
Publikováno v:
Journal of Differential Equations. 260:8072-8108
Publikováno v:
Journal of Geometry and Physics. 94:185-198
In this paper we consider the problem of constructing a 1-parameter family αλ of zero-curvature representations of an equation E, by means of classical symmetry actions on a given zero-curvature representation α. By using the cohomology defined by
Publikováno v:
Acta Applicandae Mathematicae. 92:209-239
Pseudo-Riemannian \(4\)-metrics with bidimensional null Killing orbits are studied. Both Lorentzian and Kleinian (or neutral) cases, are treated simultaneously. Under the assumption that the distribution orthogonal to the orbits is completely integra
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Publikováno v:
ResearcherID
We consider two systems of real analytic partial differential equations, related by a holomorphic contact map H. We study how the generalised symmetries of the first equation are mapped into those of the second one, and determine under which conditio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c52589a95a65035af28c2cd03a15aab0
http://hdl.handle.net/10281/5285
http://hdl.handle.net/10281/5285
Publikováno v:
Journal of Physics A: Mathematical and Theoretical. 45:265204
Some new results on the geometry of classical parabolic Monge–Ampere equations (PMAs) are presented. PMAs are either integrable, or non-integrable according to the integrability of its characteristic distribution. All integrable PMAs are locally eq