A BRST charge for non-critical $\W_{2,s}$ strings

Abstract

We present a general argument for the construction of BRST charges of the `non-critical' $\W_{2,4}$, $\W_{2,5}$, $\W_{2,6}$, and $\W_{2,8}$ strings. This evidences the existence of BRST charges for a kind of soft-type algebras which can be constructed from two copies of quantum $\W_{2,s}$ algebras, (s=3,4,5,6,8).

11 pages, phyzzx.tex, IC/94/336

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• On the BRST Operator of $W$-Strings
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