The matrix-extended $W_{1+\infty }$ algebra

Abstract

We construct a quadratic basis of generators of matrix-extended ${\mathcal{W}}_{1+\infty }$ using a generalization of the Miura transformation. This makes it possible to conjecture a closed-form formula for the operator product expansions defining the algebra. We study truncations of the algebra. An explicit calculation at low levels shows that these are parametrized in a way consistent with the gluing description of the algebra. It is perhaps surprising that in spite of the fact that the algebras are rather complicated and non-linear, the structure of their truncations follows very simple gluing rules.

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Cited by in corpus (1)

• Adding Complex Fermions to the Grassmannian-like Coset Model