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math-ph2019
Lagrangians and integrability for additive fourth-order difference equations
Giorgio Gubbiotti
We use a recently found method to characterise all the invertible fourth-order difference equations linear in the extremal values based on the existence of a discrete Lagrangian. W…
nlin.SI2019★ 5 cited
Algebraic entropy of a class of five-point differential-difference equations
G. Gubbiotti
We compute the algebraic entropy of a class of integrable Volterra-like five-point differential-difference equations recently classified using the generalised symmetry method. We s…