Abstract
Based on the kernel formula proposed by Carroll and Kodama, we derive the dispersionless Hirota equations of the universal Whitham hierarchy. We also verify the associativity equations in this hierarchy from the dispersionless Hirota equations and give a realization of the associative algebra with the structure constants expressed in terms of residue formulas.
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Prepared from an English manuscript submitted by the authors; for the Russian version, see Teoreticheskaya i Matematicheskaya Fizika, Vol. 165, No. 2, pp. 257–271, November, 2010.
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Shen, HF., Lee, NC. & Tu, MH. Kernel formula approach to the universal Whitham hierarchy. Theor Math Phys 165, 1456–1469 (2010). https://doi.org/10.1007/s11232-010-0121-4
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DOI: https://doi.org/10.1007/s11232-010-0121-4