2 papers
math.DS2026
The Riccati Characteristic Equation
Douglas R. Frey
The Riccati differential equation is examined in light of its connection to second order linear time varying systems. In that light it becomes the clear generalization for the char…
eess.SY2026
A Complete Approach to Time Varying Linear Systems
Douglas R. Frey
This paper presents a unifying theory of Linear second order systems that allows time-varying and time invariant systems to be treated in the same way for the first time. In the pr…