Integrable dispersionless PDE in 4D, their symmetry pseudogroups and deformations
arXiv:1410.7104 · doi:10.1007/s11005-015-0800-z
Abstract
We study integrable non-degenerate Monge-Ampere equations of Hirota type in 4D and demonstrate that their symmetry algebras have a distinguished graded structure, uniquely determining the equations. This is used to deform these heavenly type equations into new integrable PDE of the second order with large symmetry pseudogroups. We classify the obtained symmetric deformations and discuss self-dual hyper-Hermitian geometry of their solutions, which encode integrability via the twistor theory.
This version is updated with an appendix about multi-component extensions of the integrable equations. Our deformations can be considered as reductions of such extensions (as they are reductions of the self-duality equation), but we stress that second order deformations carry the natural geometry which encodes integrability. We also expanded the introduction a bit
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Cited by in corpus (10)
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