About me

Hello! My name is Dimitri and I am a 2nd year PhD student in Computer Science at JHU, working with Professor Nicolas Loizou. I am broadly interested in the fields of Optimization and Machine Learning.

Prior to joining JHU, I graduated with a BSc in Mathematics from the National and Kapodistrian University of Athens (NKUA) and a MSc in Data Science and Machine Learning from National Technical University of Athens (NTUA). Moreover I have a MSc in Mathematics from Germany.

CV available upon request.

Research

Stochastic Polyak Step-sizes and Momentum: Convergence Guarantees and Practical Performance
In the 13th International Conference on Learning Representations (ICLR 2025), Code
Dimitris Oikonomou, Nicolas Loizou

Sharpness-Aware Minimization: General Analysis and Improved Rates
In the 13th International Conference on Learning Representations (ICLR 2025), Code
Dimitris Oikonomou, Nicolas Loizou

Analysis of an idealized stochastic polyak method and its application to black-box model distillation
In arXiv:2504.01898, 2025
Robert Gower, Guillaume Garrigos, Nicolas Loizou, Dimitris Oikonomou, Konstantin Mishchenko, Fabian Schaipp