In this paper, the classic straightening out theorem from differential
geometry is used to derive necessary and sufficient conditions for lo
cally converting rectangular differential inclusions to constant recta
ngular differential inclusions. Both scalar and coupled differential i
nclusions are considered. The results presented in this paper have use
in the area of computer aided verification of hybrid systems where th
ey represent the frontier of the known decidable models of infinite st
ate systems. (C) 1998 Elsevier Science B.V. All rights reserved.