Abstract
In this study, we give the necessary and sufficient conditions for a function f(x,y)=∑j,k∈Zcjkexp(ijx+iky) to belong to the generalized Lipschitz classes Hω,m,n and hω,m,n in the uniform metric defined by the mixed difference of orders m,n∈N in terms of {cjk}j,k∈Z.
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