Non-Linear Potentials and Approximation in the Mean by Analytic Functions.
Let , denote the space of Bessel potentials , , with norm . For integer can be identified with the Sobolev space . One can associate a potential theory to these spaces much in the same way as classical potential theory is associated to the space , and a considerable part of the theory was carried over to this more general context around 1970. There were difficulties extending the theory of thin sets, however. By means of a new inequality, which characterizes the positive cone...
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