3 papers
math.CO2026
Ordered Ruzsa-Szemeredi Numbers at Matching Size Two
Xidan Song, Ruifeng Cao
Bondy and Szwarcfiter defined as the largest number of edges in an -vertex graph whose edge set partitions into induced copies of ; for the defi…
cs.CE2026
Discrete energy as an exact label-free training objective for finite-element surrogates
Ruifeng Cao, Xidan Song
Supervised training of finite-element (FE) surrogate models requires reference solutions, and each reference solution is obtained by solving the system that the surrogate is intend…
cs.AI2025
Beyond Accuracy: A Geometric Stability Analysis of Large Language Models in Chess Evaluation
Xidan Song, Weiqi Wang, Ruifeng Cao +1
The evaluation of Large Language Models (LLMs) in complex reasoning domains typically relies on performance alignment with ground-truth oracles. In the domain of chess, this standa…