A geometrical description for the essential spectra of a large class of Schrödinger operators is presented. Persson's formula is obtained as a corollary.
@article{1637, title = {On a Theorem of Arne Persson}, journal = {CUBO, A Mathematical Journal}, volume = {6}, year = {2004}, language = {en}, url = {http://dml.mathdoc.fr/item/1637} }
Beltiţă, Ingrid; Cornean, Horia D. On a Theorem of Arne Persson. CUBO, A Mathematical Journal, Tome 6 (2004) . http://gdmltest.u-ga.fr/item/1637/