Author

Hai Xia

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Preprint Aug 2026

Synthesizing Feature Extractors: An Agentic Approach for Algorithm Selection

An automated approach that uses Large Language Models in an agentic check--fix--verify loop to synthesize executable Python scripts that act as interpretable, problem-specific feature extractors that consistently outperform both expert-curated mzn2feat features and the best transformer-based trans2feat variants.

Hai Xia, C. Ansótegui, Stefan Szeider · 0 citations

Preprint Aug 2026

LLM-Guided Graph Generation for Structure-Based Local Improvement Methods

An automatic pipeline that is problem-agnostic to all problems in the MiniZinc format is built, finding that algorithm selection achieves a 39.6% average problem-weighted win rate against a one-shot Gurobi baseline, more than doubling the best single configuration (19.3%).

Hai Xia, Vaidyanathan Peruvemba Ramaswamy, Stefan Szeider · 0 citations