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I'm trying to understand the Kosterlitz-Thouless transition in 2d systems. There is a section in Altland and Simons' Condensed Matter Field Theory that discusses the phenomenon, but I don't really understand the role of renormalization group theory in the KT transition.

I don't have a background in group theory so the equations are confusing. I would really appreciate a more qualitative description of the main points and motivations.

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closed as too broad by Buzz, Kyle Kanos, tpg2114 Oct 1 at 0:37

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