Point transformations of the 3-rd order ordinary differential equations are considered. Special classes of ordinary differential equations that are invariant under the general point transformations are constructed.

In this paper we introduce some stability criteria for impulsive fuzzy system of differential equations with finite delay in states. Firstly, a new comparison principle for fuzzy differential system compared to crisp ordinary differential equation, based on a notion of upper quasi-monotone nondecreasing, in N dimentional state space is presented. Furthermore, in order to analyze the stability o...

Coupling constraints and ordinary differential equations has numerous applications. This paper shows how to introduce constraints involving ordinary differential equations into the numerical constraint satisfaction problem framework in a natural and efficient way. Slightly adapted standard filtering algorithms proposed in the numerical constraint satisfaction problem framework are applied to th...