Lambda: A Mathematica-package for operator product expansions in vertex algebras

We give an introduction to the Mathematica package Lambda, designed for calculating $λ$-brackets in both vertex algebras, and in SUSY vertex algebras. This is equivalent to calculating operator product expansions in two-dimensional conformal field theory. The syntax of $λ$-brackets is reviewed, and some simple examples are shown, both in component notation, and in $N=1$ superfield notation.

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