الفهرس 
acknowledgmentOnly 14 pages are availabe for public view
 |  | from | 82 |  |  |
| | | from | 82 | | |
Abstract
Differential equations are the mathematical interpreta-
tion of almost every phenomen- in different branches. Since
the field of equations considered, has extended to include
general problems then, the tools of solving them were also
&eveloped, and the main tool now in use is functional
analysis the study of partial differential equationsis an excellent
way of conveying to the researcher a feeling of interrelat-
ion between pure mathematics and the physical sciences or
engineering.