TY  - JOUR
AU  - Hansen, Anders
TI  - On the Solvability Complexity Index, the 𝑛-pseudospectrum and approximations of spectra of operators
JO  - Journal of the American Mathematical Society
PY  - 2011
SP  - 81
EP  - 124
VL  - 24
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.1090/S0894-0347-2010-00676-5/
DO  - 10.1090/S0894-0347-2010-00676-5
ID  - 10_1090_S0894_0347_2010_00676_5
ER  -