Open String Diagrams I: Topological Type

Details Open String Diagrams I: Topological Type Open String Diagrams I: Topological Type

1992-08-03

arxiv.org/abs/alg-geom/9208001v1

J.Math.Phys. 34 (1993) 4562-4574

Physics

High Energy Physics

High Energy Physics - Theory

Scientific paper

10.1063/1.530357

An arbitrary Feynman graph for string field theory interactions is analysed and the homeomorphism type of the corresponding world sheet surface is completely determined even in the non-orientable cases. Algorithms are found to mechanically compute the topological characteristics of the resulting surface from the structure of the signed oriented graph. Whitney's permutation-theoretic coding of graphs is utilized.

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