Author

Irène Votsi

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Open access Jul 2026

Reliability Inference for Semi-Markov Models based on Multiple Trajectories

We develop nonparametric inference for reliability indicators of discrete-time semi-Markov systems from independent trajectories observed over a common fixed horizon. Augmenting the physical state by the backward recurrence time yields a finite coupled Markov representation on the observed age range. We distinguish the...

S. Trevezas, M. Hamdaoui, Irène Votsi · Methodology and Computing in... · 0 citations

Preprint Jul 2026

Matrix asymptotic calculus for plug-in maximum likelihood estimators in finite Markov chains

A unified matrix-level asymptotic calculus for plug-in non-parametric maximum likelihood estimators in finite Markov models, where the stochastic constraints of the transition matrix need not be removed by a minimal parametrization.

G. Gavrilopoulos, S. Trevezas, Irène Votsi · 1 citation

Preprint Jul 2026

Evaluating the Impact of Epidemic Control via State-Dependent Markovian Switching Modeling

An exact finite-population stochastic framework for SIR epidemics evolving under Markovian switching between intervention regimes is developed, showing how switching mechanisms affect both the total number of infected individuals and the extinction time, including their dispersion.

Vasileios E. Papageorgiou, Irène Votsi, S. Trevezas · 0 citations