Asian Journal of Mathematics
Volume 16 (2012)
Harmonic forms on principal bundles
Pages: 637 – 660
We show a relationship between Chern–Simons 1- and 3-forms and harmonic forms on a principal bundle. Doing so requires one to consider an adiabatic limit. For the 3-form case, assume that G is simple and the corresponding Chern–Weil 4-form is exact. Then, the Chern–Simons 3-form on the princpal bundle G-bundle, minus a canonical term from the base, is harmonic in the adiabatic limit.
Hodge theory, adiabatic limit, Chern–Simons forms, Serre spectral sequence
2010 Mathematics Subject Classification
Primary 58A14. Secondary 55T10, 58J28.