%0 Journal Article %A Christoph Schmoeger %T The spectral mapping theorem for the essential approximate point spectrum %J Colloquium Mathematicum %D 1997 %P 167-176 %V 74 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/cm-74-2-167-176/ %R 10.4064/cm-74-2-167-176 %G en %F 10_4064_cm_74_2_167_176