Jones, Vaughan F R; Morrison, Scott; Snyder, Noah
A subfactor is an inclusion of von Neumann algebras with trivial centers. The simplest example comes from the fixed points of a group action , and subfactors can be thought of as fixed points of more general group-like algebraic structures. These algebraic structures are closely related to tensor categories and have played important roles in knot theory, quantum groups, statistical mechanics, and topological quantum field theory. There is a measure of size of a subfactor, called the index....[Show more]
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