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$w$-function of the KdV hierarchy

V. M. Buchstaber·S. Yu. Shorina
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Abstract

In this paper we construct a family of commuting multidimensional differential operators of order 3, which is closely related to the KdV hierarchy. We find a common eigenfunction of this family and an algebraic relation between these operators. Using these operators we associate a hyperelliptic curve to any solution of the stationary KdV equation. A basic generating function of the solutions of stationary KdV equation is introduced as a special polarization of the equation of the hyperelliptic curve. We also define and discuss the notion of a $w$-function of a solution of the stationary $g$-KdV equation.

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V. M. Buchstaber, S. Yu. Shorina. 2004-06-23. $w$-function of the KdV hierarchy. https://arxiv.org/abs/math/0406457

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