Fractional systems with Riemann-Liouville derivatives are considered. The
initial memory value problem is posed and studied. We obtain explicit steering
laws with respect to the values of the fractional integrals of the state
variables. The Gramian is generalized and steering functions between memory
values are characterized.Comment: Submitted 30/Nov/2009; Revised (major revision) 24/April/2010;
Accepted (after minor revision) 22/July/2010; for publication in Signal
Processin