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The practical implementation of general symmetry principles in the context of effective theories or, more generally, theories with a non-standard phase-space and unusual Lagrangians is often a difficult task that leads to new insights. In this work we deal with an important supersymmetric model the N=2 pure Yang-Mills effective gauge theory -- a four-dimensional non-trivial fully integrable quantum field theory, as shown by Seiberg and Witten -- and construct its supersymmetry currents. The study was carried on with a precise goal in mind that is the computation of the central charge of the...