Celestin A. Nse  , 
    Constrained Controllability of Infinite Dimensional Systems with Single Point Delay in Control,
    Research Journal of Applied Sciences,
    Volume 2,Issue 7,
    2007,
    Pages 804-806,
    ISSN 1815-932x,
    rjasci.2007.804.806,
    (https://makhillpublications.co/view-article.php?doi=rjasci.2007.804.806)
    Abstract: In this research, we study the semi linear infinite dimensional abstract control system with single constant delay in the control given by x (t) = Ax (t) + F (x (t)) + B<SUB>0</SUB>u (t) + B<SUB>1</SUB>u (t h) with zero initial conditions x (0) = 0 , u (t) = 0 for t   [-h,0) where the state x (t) takes values in a real Banach space X and the control u (t) is in another real Banach space U.
    Keywords: Constrained controllability;infinite dimensional systems;single point;control