Lecture 4 of Polyakovs Course on String Theory

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These lectures were given by Professor Alexander Polyakov when he taught a graduate course on String Theory at Princeton in the fall semesters of 2013 and 2014. Vladimir Kirilin, a student in the class, reviewed the videos. • See more information on the course website below: • https://web.archive.org/web/20220814091148... • Summary of this lecture by Vladimir Kirilin: • Scaling dimensions of the Ising model. From scale invariance to conformal 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