PUBLICATIONS DE L'INSTITUT MATHÉMATIQUE (BEOGRAD) (N.S.) Vol. 46(60), pp. 113118 (1989) 

The formal solution of Mikusi\'nski operational differential equations with variable coefficientsI. E. SharkawiDepartment of Mathematics, Faculty of Science AlAzhar University, Cairo, EgyptAbstract: The formal solution of the homogeneous linear differential equation $$ x^{(n)}(\lambda)+a_{n1}(\lambda)x^{(n1)}(\lambda)+\cdots +a_0(\lambda)x(\lambda)=0,\ 0\le\lambda\le\Lambda $$ is considered. $x(\lambda)$ and $a_i(\lambda)$ are functions which map the interval $[0,\Lambda]$ into the field $M$ of Mikusi\'nski operators [2]. Classification (MSC2000): 44A40 Full text of the article:
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