Current and former world leaders in the data include the prime minister of Iceland, the president of Ukraine, and the king of Saudi Arabia ...
An illustration of a magnifying glass. An illustration of a magnifying glass.
ABSTRACT: In this paper we consider the Nemytskii operator, i.e., the composition operator defined by (Nf)(t)=H(t,f(t)), where H is a given set-valued function. It is shown that if the operator N maps ...
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