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dc.contributor.authorBielas, Krzysztof-
dc.contributor.authorDubovyk, Ievgen-
dc.contributor.authorGluza, Janusz-
dc.contributor.authorRiemann, Tord-
dc.identifier.citationActa Physica Polonica B, Vol. 44, no. 11 (2013), s. 2249-2255pl_PL
dc.description.abstractTwo criteria for planarity of a Feynman diagram upon its propagators (momentum flows) are presented. Instructive Mathematica programs that solve the problem and examples are provided. A simple geometric argument is used to show that while one can planarize non-planar graphs by embedding them on higher-genus surfaces (in the example it is a torus), there is still a problem with defining appropriate dual variables since the corresponding faces of the graph are absorbed by torus generators.pl_PL
dc.rightsUznanie autorstwa 3.0 Polska*
dc.subjectalgebra komputerowapl_PL
dc.subjectchromodynamika kwantowapl_PL
dc.subjectdiagramy Feynmanapl_PL
dc.titleSome remarks on non-planar Feynman diagramspl_PL
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