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Authors: BARNABÁS BEDE.
(with the explicit constant C = 12) and to prove by a counterexample that in some sense, for arbitrary f this type of order of approximation with respect to ω1(f ;) cannot be improved. However, for some subclasses of functions including for example the nondecreasing concave functions, the essentially better order of approximation 
is obtained. Finally, some shape preserving properties are proved. Key words and phrases. Nonlinear Baskakov operator of max-product kind, degree of approximation, shape preserving properties.
