Operators and Matrices · Volume 10, Issue 4 On the index of a non-Fredholm model operator 10-50 Pages 881-914 DOI 10.7153/oam-10-50 Downloads Short PDF Full PDF PNG Authors Alan Carey Fritz Gesztesy Galina Levitina Fedor Sukochev Keywords Fredholm and Witten index spectral shift function Subject classes 47A53 58J30 47A10 47A40