T.T. Yusuf  , 
    Another Aspect of Duality in Linear Systems,
    Journal of Engineering and Applied Sciences,
    Volume 2,Issue 5,
    2007,
    Pages 944-947,
    ISSN 1816-949x,
    jeasci.2007.944.947,
    (https://makhillpublications.co/view-article.php?doi=jeasci.2007.944.947)
    Abstract: In state space context, linear systems’ duality is usually expressed in a particular form. Here, we showed that this concept of duality in a linear system transcends mere representation of the system in its dual form; rather, it is also manifested in some of the system’s properties. Consequently, we examined 2 salient system’s properties and established the manifestation of the duality concept between them.
    Keywords: State space;duality;controllability;observability;transition matrix;range space and null space