Harte, Robin, and Anthony, Wickstead. "Upper and Lower Fredholm Spectra II.." Mathematische Zeitschrift 154 (1977): 253-256. <http://eudml.org/doc/172530>.
@article{Harte1977, author = {Harte, Robin, Anthony, Wickstead}, journal = {Mathematische Zeitschrift}, keywords = {Delta-Net; Space of All Bounded Sequences; Calkin Algebra; Lower Fredholm Spectra; Essential Spectrum; Supremum Norm; Coset}, pages = {253-256}, title = {Upper and Lower Fredholm Spectra II.}, url = {http://eudml.org/doc/172530}, volume = {154}, year = {1977}, }
TY - JOUR AU - Harte, Robin AU - Anthony, Wickstead TI - Upper and Lower Fredholm Spectra II. JO - Mathematische Zeitschrift PY - 1977 VL - 154 SP - 253 EP - 256 KW - Delta-Net; Space of All Bounded Sequences; Calkin Algebra; Lower Fredholm Spectra; Essential Spectrum; Supremum Norm; Coset UR - http://eudml.org/doc/172530 ER -