%0 Journal Article %A Najafi, Hamed %T An extension of the van Hemmen–Ando norm inequality %J Glasgow mathematical journal %D 2023 %P 121-127 %V 65 %N 1 %U http://geodesic.mathdoc.fr/articles/10.1017/S0017089522000155/ %R 10.1017/S0017089522000155 %F 10_1017_S0017089522000155