On Discrete 3-Dimensional Equations Associated with the Local Yang-Baxter Relation

R. M. Kashaev

doi:10.1007/bf01815521

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On Discrete 3-Dimensional Equations Associated with the Local Yang-Baxter Relation

R. M. Kashaev

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Abstract

The local Yang-Baxter equation (YBE), introduced by Maillet and Nijhoff, is a proper generalization to 3 dimensions of the zero curvature relation. Recently, Korepanov has constructed an infinite set of integrable 3-dimensional lattice models, and has related them to solutions to the local YBE. The simplest Korepanov's model is related to the star-triangle relation in the Ising model. In this paper the corresponding discrete equation is derived. In the continuous limit it leads to a differential 3d equation, which is symmetric with respect to all permutations of the three coordinates. A similar analysis of the star-triangle transformation in electric networks leads to the discrete bilinear equation of Miwa, associated with the BKP hierarchy. Some related operator solutions to the tetrahedron equation are also constructed.

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BibTeX RIS

R. M. Kashaev. 1995-12-11. On Discrete 3-Dimensional Equations Associated with the Local Yang-Baxter Relation. https://doi.org/10.1007/bf01815521

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