Construction and classification of integrable differential-difference equations through Lax operators, recursion operators, and Hamiltonian structures.
Algebraic approaches to the quantization of discrete integrable systems, including the Volterra hierarchy and its noncommutative extensions.
Realizations of classical W-algebras through reductions of integrable hierarchies and Adler-type operators.
Rational differential operators, Hamiltonian structures, and Lax formulations for continuous integrable systems.