Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
1993-12-31
Theor.Math.Phys.100:890-899,1995; Teor.Mat.Fiz.100:119-131,1994
Physics
High Energy Physics
High Energy Physics - Theory
12 pages, ITEP M-8/93, FIAN/TD-22/93, CRM-1934 (minor changes)
Scientific paper
10.1007/BF01017328
We first review the properties of the conventional $\tau$-functions of the KP and Toda-lattice hierarchies. A straightforward generalization is then discussed. It corresponds to passing from differential to finite-difference equations; it does not involve however the concept of operator-valued $\tau$-function nor the one associated with non-Cartanian (level $k\ne1$) algebras. The present study could be useful to understand better $q$-free fields and their relation to ordinary free fields.
Mironov Aleksej
Morozov Alexander
Vinet Luc
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