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All generalized SU(2) chiral models have spectral dependent Lax formulation

L. Hlavaty
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Abstract

The equations that define the Lax pairs for generalized principal chiral models can be solved for any nondegenerate bilinear form on $su(2)$. The solution is dependent on one free variable that can serve as the spectral parameter.

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L. Hlavaty. 1998-03-26. All generalized SU(2) chiral models have spectral dependent Lax formulation. https://arxiv.org/abs/solv-int/9803017

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