Geodesic
Negative Times of the Davey–Stewartson Integrable Hierarchy
Symmetry, integrability and geometry: methods and applications, Tome 17 (2021) Cet article a éte moissonné depuis la source Math-Net.Ru

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We use example of the Davey–Stewartson hierarchy to show that in addition to the standard equations given by Lax operator and evolutions of times with positive numbers, one can consider time evolutions with negative numbers and the same Lax operator. We derive corresponding Lax pairs and integrable equations.
Keywords: commutator identities, integrable hierarchies, reductions. 
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     author = {Andrei K. Pogrebkov},
     title = {Negative {Times} of the {Davey{\textendash}Stewartson} {Integrable} {Hierarchy}},
     journal = {Symmetry, integrability and geometry: methods and applications},
     year = {2021},
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     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SIGMA_2021_17_a90/}
}
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Andrei K. Pogrebkov. Negative Times of the Davey–Stewartson Integrable Hierarchy. Symmetry, integrability and geometry: methods and applications, Tome 17 (2021). http://geodesic.mathdoc.fr/item/SIGMA_2021_17_a90/

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