Lax representations with non-removable parameter and exotic cohomology of symmetry algebras of PDEs

Abstract

This paper develops the technique of constructing Lax representations for PDEs via non-central extensions of their contact symmetry algebras. We show that the method is applicable to the Lax representations with non-removable spectral parameters.

References in corpus (2)

• Geometry of jet spaces and integrable systems
• Non-Hamiltonian generalizations of the dispersionless 2DTL hierarchy