Author

Bo Zeng

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Preprint Sep 2026

Single-Loop Gradient Algorithms for Pessimistic Bilevel Optimization Problems

This work proposes a smooth approximation of PBO through reformulation, penalization and regularization, and establishes convergence guarantees in terms of both minimizers and stationarity, and develops two single-loop algorithms for deterministic and stochastic PBOs, respectively.

Qi Cao, Bo Zeng, Shang-Zhi Zeng et al. · 0 citations

Aug 2026

Integrating Data Cleaning and Robustification: A Study on Linear Regression

A general framework is proposed that integrates both optimistic and pessimistic optimization approaches in solving the regression problem to address outlier cleaning and robustification in a unified fashion and develops solution methods that can be applied to handle data sets of different scales.

Utku Tarık Bilgiç, Xiaoning Qian, Bo Zeng · INFORMS journal on computing · 0 citations