A vertex operator algebra (VOA) is a mathematical structure that encodes the properties of two-dimensional conformal field theories, integrating aspects of algebraic structures and quantum field theory. It consists of a vector space equipped with a vertex operator, which facilitates the creation and annihilation of states, allowing for an algebraic description of physical phenomena. VOAs are pivotal in connecting physics, representation theory, and geometry, especially in the context of Lie superalgebras and supersymmetry.
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