Weak pullback attractors of setvalued processes

[摘要] Weak pullback attractors are defined for nonautonomous setvalued processes and their existence and upper semicontinuous convergence under perturbation is established. Unlike strong pullback attractors, invariance and pullback attraction here are required only for at least one trajectory rather than all trajectories at each starting point. The concept is useful in, for example, continuous time control systems and is related to that of viability.

[发布日期] 2003-12-15

[关键词] setvalued processes;pullback attraction;weak invariance