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The spectral matrices of Toda solitons and the fundamental solution of some discrete heat equations

Luc Haine (2005)

Annales de l’institut Fourier

The Stieltjes spectral matrix measure of the doubly infinite Jacobi matrix associated with a Toda g -soliton is computed, using Sato theory. The result is used to give an explicit expansion of the fundamental solution of some discrete heat equations, in a series of Jackson’s q -Bessel functions. For Askey-Wilson type solitons, this expansion reduces to a finite sum.

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