Stability Properties of Multi-Term Fractional-Differential Equations

Necessary and sufficient stability instability conditions are reviewed extended for multi-term homogeneous linear fractional differential equations with Caputo derivatives constant coefficients. A comprehensive review of the state art regarding analysis two-term three-term fractional-order is provided, which then to case four-term equations. The properties characterized respect coefficients equations, leading both fractional-order-dependent fractional-order-independent characterizations. In general case, described an arbitrary number derivatives.