Canonical forms for -structures in pseudo-riemannian manifolds
Sergio Benenti, Mauro Francaviglia (1979)
Annales de l'I.H.P. Physique théorique
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Sergio Benenti, Mauro Francaviglia (1979)
Annales de l'I.H.P. Physique théorique
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Hinterleitner, Franz
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The author considers the Klein-Gordon equation for -dimensional flat spacetime. He is interested in those coordinate systems for which the equation is separable. These coordinate systems are explicitly known and generally do not cover the whole plane. The author constructs tensor fields which he can use to express the locus of points where the coordinates break down.
David Bryant, André Nies, Paul Tupper (2017)
Analysis and Geometry in Metric Spaces
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The Urysohn space is a separable complete metric space with two fundamental properties: (a) universality: every separable metric space can be isometrically embedded in it; (b) ultrahomogeneity: every finite isometry between two finite subspaces can be extended to an auto-isometry of the whole space. The Urysohn space is uniquely determined up to isometry within separable metric spaces by these two properties. We introduce an analogue of the Urysohn space for diversities, a recently developed...
Yavuz Nutku (1974)
Annales de l'I.H.P. Physique théorique
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M. Radić (1968)
Matematički Vesnik
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Jan Tarski (1974)
Annales de l'I.H.P. Physique théorique
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