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Possible Duplicate:
Are there books on Regularization at an Introductory level?

I am looking for a good introduction to renormalization (group). I have read several books about it but never really understand the idea. I know that the rough idea is to introduce the bare mass etc to absorb infinite integrals in perturbation theory. But my understanding stops at this point. I would really appreciate your help.

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marked as duplicate by David Z Feb 1 '13 at 0:28

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