%0 Journal Article %A Sébastien Ferenczi %T Rank and spectral multiplicity %J Studia Mathematica %D 1992 %P 121-144 %V 102 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/sm-102-2-121-144/ %R 10.4064/sm-102-2-121-144 %G en %F 10_4064_sm_102_2_121_144