الفهرس 
Normed linear spacesOnly 14 pages are availabe for public view
 |  | from | 121 |  |  |
| | | from | 121 | | |
Abstract
The modern physical theories pay much attention t o
express physics1 quantities such as energy and mommtum
by making use of mathematical operators which are almost
differential operators, So, the study of spectral properties
of differential oper’afors can be considered as an
important and basic branch of functional analysis.