2 papers
math-ph2004
Covariant forms of Lax one-field operators
Leble sergey
Polynomials in differentiation operators are considered. The Darboux transformations covariance determines non-Abelian entries to form the coefficients of the polynomials. Joint co…
nlin.SI2001
Lax Pair Covariance and Integrability of Compatibility Condition
Leble Sergey
We continue to study Lax (L-A, U-V) pairs (LP) joint covariance with respect to Darboux transformations (DT) as a classification principle. The scheme is based on a comparison of g…