Instability of Difierential Equations with Piecewise Constant Argument of Generalized Type

. The article establishes a result of Lyapunov instability to di(cid:27)erential equations with piecewise constant argument of generalized type (EPCAG), through the qualitative study of solutions for EPCAG via functions of continuous time. Using the result established in the article, we study the instability of a logistic equation with piecewise constant argument of generalized type.