Fractional Differential Calculus · Volume 10, Issue 1 Controllability and observability of time-invariant linear nabla fractional systems 10-02 Pages 19-39 DOI 10.7153/fdc-2020-10-02 Downloads Short PDF Full PDF PNG Authors Ferhan M. Atıcı Tilekbek Zhoroev Keywords discrete fractional calculus linear fractional difference equation controllability observability Subject classes 93B05 26A33 39A13 93B07 93C55