TY  - BOOK
AU  - Ramesh Kumar
AU  -  Dr S C Arora Gu.
AU  -  Prof B S Yadav Gu.
AU  - University of Delhi. Faculty of Mathematical Sciences. Department of Mathematics
ED  - University of Delhi. Faculty of Mathematical Sciences. Department of Mathematics
TI  - Essential numerical ranges and essential spectra of hilbert space operators
PY  - 1980///
KW  - MATHEMATICS
ER  -