%0 Generic %A Lan Kunquan %D 2020 %F acta:73774 %K Differenciálegyenlet %N 84 %T Compactness of Riemann-Liouville fractional integral operators %U http://acta.bibl.u-szeged.hu/73774/ %V 4 %X We obtain results on compactness of two linear Hammerstein integral operators with singularities, and apply the results to give new proof that Riemann–Liouville fractional integral operators of order α ∈ (0, 1) map L p (0, 1) to C[0, 1] and are compact for each p ∈ 1 1−α . We show that the spectral radii of the Riemann–Liouville fractional operators are zero. %Z Bibliogr.: p. 13-15. ; összefoglalás angol nyelven