On the status of perturbation theory

Perturbation theory has always been an important part of natural sciences. From celestial mechanics to quantum theory of fields it has always played a central role that this little note would like to analyze briefly. We will show in particular how its epistemological situation has changed, from being a ”tool” to being the basis of definition of objects in quantum field theory.

• Type: Journal
• Year: 2007
• Where: MSCS
• Authors: Thierry Paul
• Keywords: Celestial Mechanics, MSCS 2007, Perturbation Theory, Theory