الفهرس 
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Abstract
For the history of the integral equations, see bernkoff [1]. Integral equations appeared in the history of mathematics in the thesis of N. H. Abdel, which published in 1826. liouville, in 1837, published a discussion on the relation between integral equations in which be showed that a particular solution of a certain linear differential equations can be obtained by solving an integral equation of a type somewhat different form, through closely resembling, Abel’s equation. And he originated the method of solution of integral equations by successive substitutions.