%0 Journal Article %A Lech Maligranda %T A simple proof of the real Riesz–Thorin interpolation theorem in the lower triangle %J Colloquium Mathematicum %D 2023 %P 99-103 %V 172 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/cm8942-10-2022/ %R 10.4064/cm8942-10-2022 %G en %F 10_4064_cm8942_10_2022