TY - JOUR AU - Khalid Latrach AU - J. Martin Paoli AU - Pierre Simonnet TI - Some facts from descriptive set theory concerning essential spectra and applications JO - Studia Mathematica PY - 2005 SP - 207 EP - 225 VL - 171 IS - 3 UR - http://geodesic.mathdoc.fr/articles/10.4064/sm171-3-1/ DO - 10.4064/sm171-3-1 LA - en ID - 10_4064_sm171_3_1 ER -