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I've also read RG flow on Peskin's. I think have to say I still don't have a clear image of the meaning of RG flow since the notes I've read so far discuss the topic with a particular example mostly with real scalar field. In addition, I read in a paper that there are several different types of RG flow and it makes me even more confused.
Can you suggest me a good reference on RG flow based on more mathematical language? I need to grasp a precise general overview!
