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Working paper

Instantons in sigma model and tau functions

arXiv:1611.02248. arXiv:1611.02248. arXiv:1611.02248, 2016
Antonov E., Orlov A. Y.
We show that a number of multiple integrals may viewed as tau functions of various integrable hierarchies. The instanton contributions in the two-dimensional O(3) sigma model is an example of such an approach.