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We consider the Calogero-Degasperis-Ibragimov-Shabat (CDIS) equation and findthe complete set of its nonlocal symmetries depending on the local variablesand on the integral of the only local conserved density of the equation inquestion. The Lie algebra of these symmetries turns out to be a centralextension of that of local generalized symmetries.Comment: arxiv version is already officia

A Remark on Nonlocal Symmetries for the Calogero­Degasperis­Ibragimov­Shabat Equation

A Remark on Nonlocal Symmetries for the CalogeroDegasperisIbragimovShabat Equation