# An introduction paper or book to Spectral Flow

Is there someone can tell me some papers or books about the basic material of Spectral flow? I want to know, what is spectral flow and how to use it to geometry.

-
MathOverflow is not the appropriate place to ask somebody to write an expository article for you. If you want somebody to write an article about some subject, you should make a stub on Wikipedia, make a query block on nLab, or make a request on PlanetMath. –  noobcake Nov 29 '10 at 15:22
I think maybe the OP just asks for a reference... –  Pietro Majer Nov 29 '10 at 15:31
You could try Atiyah-Patodi-Singer (if I remember correctly, spectral flow is discussed in part III of their series). –  Tim Perutz Nov 29 '10 at 15:52
@Tim Perutz,Thank you! –  Chen Nov 30 '10 at 2:56