Equation with the lower negative time number in the Davey--Stewartson hierarchy
Abstract
In SIGMA 17 (2021), 091, 12 p.p.\ we have presented an integrable system with a negative time variable number for the Davey-Stewartson hierarchy. Here we develop this approach to construct an integrable equation with a lower time variable number. In addition, we show that the system reduced by this time is a new integrable equation in the dimension 1+1.
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