Dispersionless BKP equation, the Manakov-Santini system and Einstein-Weyl structures

DOI10.3390/SYM13091699arXiv2108.03078MaRDI QIDQ6374657

Publication date: 6 August 2021

Abstract: We construct a map of solutions of the dispersionless BKP (dBKP) equation to solutions of the Manakov-Santini (MS) system. This map defines an Einstein-Weyl structure corresponding to the dBKP equation through the general Lorentzian Einstein-Weyl structure corresponding to the MS system. We give a spectral characterisation of reduction of the MS system which singles out the image of the dBKP equation solutions and also consider more general reductions of this class. We define the BMS system and extend the map defined above to the map (Miura transformation) of solutions of the BMS system to solutions of the MS system, thus obtaining an Einstein-Weyl structure for the BMS system.

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