Geodesic
Hardy--Steklov Operators and the Duality Principle in Weighted First-Order Sobolev Spaces on the Real Axis
Matematičeskie zametki, Tome 105 (2019) no. 1, pp. 108-122.

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Estimates of the norms of spaces associated to weighted first-order Sobolev spaces with various weight functions and summation parameters are established. As the main technical tool, boundedness criteria for the Hardy–Steklov integral operator with variable limits of integration in Lebesgue spaces on the real axis are used.
Keywords: Sobolev space, Hardy–Steklov operator, duality principle. 
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V. D. Stepanov; E. P. Ushakova. Hardy--Steklov Operators and the Duality Principle in Weighted First-Order Sobolev Spaces on the Real Axis. Matematičeskie zametki, Tome 105 (2019) no. 1, pp. 108-122. http://geodesic.mathdoc.fr/item/MZM_2019_105_1_a9/

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