6 citations · 19 across the 29 of their papers we have counts for
35 papers
Two-Regime Risk Measures under Convex Loss
Mihaela-Adriana Nistor, Ionel Popescu
We study a two-regime summary of a real-valued loss distribution. The two representative levels and the boundary between them are chosen by minimizing a convex residual loss. When…
One-Cut Risk Profiles under Quadratic Loss: Discrete Convexity, Continuous Limits, and Higher Dimensions
Mihaela-Adriana Nistor, Ionel Popescu
In this note we study a two-regime representation of a loss random variable under quadratic error. For a finite law we compute exactly the change of the optimal risk when one atom…
Non-Gaussianity of the Stagnation Law in Particle Swarm Optimization
Alexandra - Ionela Andriciuc, Ionel Popescu, David - Corneliu Turturean
We study one-dimensional particle swarm optimization during stagnation, with two fixed distinct attractors and equal independent uniform acceleration ranges. The position then sati…
Rank-One Fluctuations in Averaging-Learning Dynamics
Ionel Popescu, Tushar Vaidya
We study averaging-learning dynamics without an exogenous ground truth: the reference signal is generated endogenously by the population. The dynamics combine a time-varying averag…
Anchoring and Mixed-Norm Contractions in Averaging-Learning Dynamics
Ionel Popescu, Jeven Syatriadi, Tushar Vaidya
A single informed agent can draw an arbitrarily large network to the ground truth. This is the sharpest consequence of the "Averaging plus Learning" framework studied here, where a…
Generic local identifiability for ODE inverse problems from discrete observations
Marian Petrica, Ionel Popescu
We study local identifiability of parameters in ordinary differential equation models from finitely many observations. The central object is the parameter-to-observation map obtain…