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On the Godunova-Levin-Schur class of functions
, 2009In 1985 Godunova and Levin have considered the following class of functions. A function f : I → R is said to belong to the class Q(I) if it is nonnegative and for all x,y ∈ I and t ∈ (0,1) , satisfies the inequality: f ((1− t)x+ ty) f (x) 1− t + f (y) t ...
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