P. Picard et al., WEAK CONTROLLABILITY AND CONTROLLABILITY INDEXES FOR LINEAR NEUTRAL SYSTEMS, Mathematics and computers in simulation, 45(3-4), 1998, pp. 223-233
Weak controllability concept is analysed for linear neutral delay-diff
erential systems, according to an algebraic approach (ring theory). A
geometric interpretation in terms of state trajectories is given, base
d on the definition of controllability indices. (C) 1998 IMACS/Elsevie
r Science B.V.