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From Agmon-Kannai expansion to Korteweg-de Vries hierarchy

Iosif Polterovich

solv-intarXiv:solv-int/9905001

Abstract

We present a new method for computation of the Korteweg-de Vries hierarchy via heat invariants of the 1-dimensional Schrodinger operator. As a result new explicit formulas for the KdV hierarchy are obtained. Our method is based on an asymptotic expansion of resolvent kernels of elliptic operators due to S.Agmon and Y.Kannai.

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