We develop a partitioning lemma (see Lemma 5) for superadditive set functions satisfying certain continuity conditions. This leads to a relatively simple proof of two theorems of A. S. Besicovitch on ...
The study of Korteweg–de Vries (KdV) type equations has progressed significantly, particularly in understanding the analytic properties of their solutions and the framework of well-posedness. These ...
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