On the structure and representations of the insertion-elimination Lie algebra

Details On the structure and representations of the insertion-elimination Lie algebra On the structure and representations of the insertion-elimination Lie algebra

2007-11-03

arxiv.org/abs/0711.0463v1

Mathematics

Quantum Algebra

Scientific paper

10.1007/s11005-008-0235-x

We examine the structure of the insertion-elimination Lie algebra on rooted trees introduced in \cite{CK}. It possesses a triangular structure $\g = \n_+ \oplus \mathbb{C}.d \oplus \n_-$, like the Heisenberg, Virasoro, and affine algebras. We show in particular that it is simple, which in turn implies that it has no finite-dimensional representations. We consider a category of lowest-weight representations, and show that irreducible representations are uniquely determined by a "lowest weight" $\lambda \in \mathbb{C}$. We show that each irreducible representation is a quotient of a Verma-type object, which is generically irreducible.

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