%0 Journal Article %A William B. Johnson %T A universal non-compact operator %J Colloquium Mathematicum %D 1971 %P 267-268 %V 23 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/cm-23-2-267-268/ %R 10.4064/cm-23-2-267-268 %G en %F 10_4064_cm_23_2_267_268