%0 Journal Article
%T Invariants from classical field theory
%A Rafael Diaz
%A Lorenzo Leal
%J Mathematics
%D 2007
%I arXiv
%R 10.1063/1.2937075
%X We introduce a method that generates invariant functions from perturbative classical field theories depending on external parameters. Applying our methods to several field theories such as abelian BF, Chern-Simons and 2-dimensional Yang-Mills theory, we obtain, respectively, the linking number for embedded submanifolds in compact varieties, the Gauss' and the second Milnor's invariant for links in S^3, and invariants under area-preserving diffeomorphisms for configurations of immersed planar curves.
%U http://arxiv.org/abs/0705.1017v3