%0 Journal Article %A Khalid Latrach %A J. Martin Paoli %A Pierre Simonnet %T Some facts from descriptive set theory concerning essential spectra and applications %J Studia Mathematica %D 2005 %P 207-225 %V 171 %N 3 %U http://geodesic.mathdoc.fr/articles/10.4064/sm171-3-1/ %R 10.4064/sm171-3-1 %G en %F 10_4064_sm171_3_1