For a space (X, d, μ) of homogeneous type and a fractional type integral operator Kα defined on (X, d, μ) we find a necessary and sufficient condition on the exponent q governing the compactness of Kα from Lp(X) to Lq(X), where 1 ≤ p, q < ∞ and μ(X) < ∞.
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Dedicated to the 85th birthday of Professor V. Maz’ya
Translated from Problemy Matematicheskogo Analiza 118, 2022, pp. 109-115.
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Kokilashvili, V., Meskhi, A. Compactness of Fractional Type Integral Operators on Spaces of Homogeneous Type. J Math Sci 268, 368–375 (2022). https://doi.org/10.1007/s10958-022-06202-2
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DOI: https://doi.org/10.1007/s10958-022-06202-2