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math.CA2023
Best Ulam constants for damped linear oscillators with variable coefficients
Douglas R. Anderson, Masakazu Onitsuka, Donal O'Regan
This study uses an associated Riccati equation to study the Ulam stability of non-autonomous linear differential vector equations that model the damped linear oscillator. In partic…
math.CA2023
Best Ulam constants for two-dimensional non-autonomous linear differential systems
Douglas R. Anderson, Masakazu Onitsuka, Donal O'Regan
This study deals with the Ulam stability of non-autonomous linear differential systems without assuming the condition that they admit an exponential dichotomy. In particular, the b…