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Ruoran Xu

Xi'an Jiaotong-Liverpool University

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Preprint Oct 2026

Symbolic Search Is Not Exhausted: Persistent Proof-Space Exploration in Lean4

Formal theorem proving increasingly combines learned semantic guidance with verified symbolic execution. The quality of the symbolic search substrate therefore determines how much useful mathematical structure can be accumulated, reused, and exposed under a finite inference budget. We introduce ViaLean, a Lean4 prover...

Ruoran Xu · 0 citations
Preprint Aug 2026

PhysElite: How Far Are LLMs from Solving Olympiad-Level Physics Problems?

PhysElite is presented, a large-scale bilingual multimodal benchmark for Olympiad-level physics reasoning that benchmarks 18 open-source and closed-source MLLMs, and finds that even the strongest model reaches only 33.7% answer accuracy.

Ruoran Xu, Wen-Ding Gao, Liyunfeng Chen et al. · 1 citation

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