Anomalies and cohomologies | Ludwig D. Faddeev | Лекториум
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Загружено: 2013-10-14
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Anomalies and cohomologies | Лектор: Ludwig D. Faddeev | Организатор: Математическая лаборатория имени П.Л.Чебышева
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Anomaly is an object in the quantum theory of fields, physicists like fancy words. Field Theory is a system with infinite number of degrees of freedom and upon quantisation some symmetries break down. This is called anomaly.I will argue that in the case of the Yang-Mills theory the symmetry is not broken but is rather modified. Group action is supplied with a factor and/or is substituted by a projective presentation. Corresponding one and two cocycles are produced by the Chern-Simons descent procedure starting from the third Chern class.
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