See discussions, stats, and author profiles for this publication at: https://www.researchgate.net/publication/26534400 On the initial value problem for a partial differential equation with operator coefficients Article in International Journal of Mathematics and Mathematical Sciences · January 1980 DOI: 10.1155/S0161171280000075 · Source: DOAJ CITATIONS 10 READS 19 1 author: Mahmoud El-Borai Alexandria University 59 PUBLICATIONS 547 CITATIONS SEE PROFILE All content following this page was uploaded by Mahmoud El-Borai on 21 December 2013. The user has requested enhancement of the downloaded file.