Abstract
In this paper we attempt to define axiomatic measures of non-compactness for Sobolev spaces of integer order \( W^{n,p}(\Omega )\), where \(\Omega \subset \mathbb {R}^{d}\) (which is equivalent to \(\Omega \) being any set of infinite measure). We consider two cases, one with \(\Omega \) being an open subset with finite measure, and another when \(\Omega =\mathbb {R}^{d}\), and discuss basic features of the measure of non-compactness in each case. Next we define a partial measure of non-compactness on space \(L^{p}(\Omega ;B)\), where B is a Banach space. Furthermore, we give some application to solve the functional integro-differential equation in \(W^{1,p}(\Omega ).\)
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25 March 2023
10 March 2023
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a measurable function by definition is a.e. the limit of a sequence of countably-valued functions
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Mursaleen, M., Rizvi, S.M.H., Arab, R. et al. On measure of noncompactness in Lebesgue and Sobolev spaces with an application to the functional integro-differential equation. Aequat. Math. 97, 199–217 (2023). https://doi.org/10.1007/s00010-022-00906-1
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DOI: https://doi.org/10.1007/s00010-022-00906-1