TY  - BOOK
AU  - Helmberg,Gilbert
TI  - Introduction to spectral theory in Hilbert space
SN  - 0720423503 :
U1  - 517.5 
PY  - 1969///
CY  - Amsterdam
PB  - North-Holland Pub.
KW  - Spectral theory (Mathematics)
KW  - Hilbert space
KW  - Linear operators
N1  - Bibliography: p. 330-333
ER  -