Mehul Motani — Papers on Cortexa

arxivcs.NE2026-07-31

Analysis of Memory-Runtime Trade-offs in Caching Strategies for Genetic Programming Symbolic Regression

Genetic Programming Symbolic Regression (GPSR) generates mathematical expressions to model input-output relationships using an evolutionary process. A significant challenge in GPSR lies in the repeated evaluation of entire expressions or their sub-expression, which inflates compu…

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arxivcs.LG2026-07-05

On the effectiveness of reward functions in reinforcement learning for confidence calibration of large language models

Chee Heng Tan, Zhuoyi Lin, Mehul Motani, Wee Sun Lee

In this paper, we consider the setting where large language models (LLMs) are trained using reinforcement learning (RL) to simultaneously improve reasoning accuracy and verbalize its confidence. Our reward scheme uses two functions for rewarding confidence verbalized by the LLM:…

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