59 research outputs found
The vacuum preserving Lie algebra of a classical W-algebra
We simplify and generalize an argument due to Bowcock and Watts showing that
one can associate a finite Lie algebra (the `classical vacuum preserving
algebra') containing the M\"obius subalgebra to any classical
\W-algebra. Our construction is based on a kinematical analysis of the
Poisson brackets of quasi-primary fields. In the case of the \W_\S^\G-algebra
constructed through the Drinfeld-Sokolov reduction based on an arbitrary
subalgebra of a simple Lie algebra \G, we exhibit a natural
isomorphism between this finite Lie algebra and \G whereby the M\"obius
is identified with .Comment: 11 pages, BONN-HE-93-25, DIAS-STP-93-13. Some typos had been removed,
no change in formula
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