[Guille]

Originally Posted by AntonioLao I think, they used Lagrangian formalism. The descriptive and operative power of renormalization can be seen in the following: http://math.ucr.edu/home/baez/renormalization.html http://en.wikipedia.org/wiki/Renormalization http://en.wikipedia.org/wiki/Renormalization_group http://www.pha.jhu.edu/~blechman/papers/renormalization/ http://www.cmp.caltech.edu/~mcc/chaos_new/Map_docs/rg.html http://www.ibiblio.org/e-notes/MSet/Scaling.htm

I'll search on the web and do some investigatiosn of my own to see if I can change something about QM if I use hamiltonian formalism.

About renormalization, I understand what it is, but what is the reason of it's aplication? And is there any alternative action in maths, which doesn't do what renormalization does but tries to achieve the same goal?