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1. General results
1.1 Problem position
A differential equation is said to be linear when it expresses the cancellation condition of a linear application, or, if you prefer, of a differential operator. In contrast to partial differential equations, differential equations have functions of a single scalar variable as their unknown functions. We'll concentrate on the case where the variable is real. If E is a normed vector space, the space of continuous endomorphisms of E is
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General results
Linear differential equations with constant coefficients
