Open String Diagrams I: Topological Type
alg-geom
2009-10-22 v1 高能物理 - 理论
代数几何
摘要
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.
引用
@article{arxiv.alg-geom/9208001,
title = {Open String Diagrams I: Topological Type},
author = {Subhashis Nag and Parameswaran Sankaran},
journal= {arXiv preprint arXiv:alg-geom/9208001},
year = {2009}
}