2 papers
cs.LG2026
ReCo: Reweighting GRPO Against Distributional Concentration
Junoh Park, Junseo Hwang, Wonguk Cho +1
Group Relative Policy Optimization (GRPO) has become a standard reinforcement learning method for post-training language models. Recent work shows that GRPO can reduce the base mod…
cs.LG2025
PiCa: Parameter-Efficient Fine-Tuning with Column Space Projection
Junseo Hwang, Wonguk Cho, Taesup Kim
Fine-tuning large foundation models is essential for building expert models tailored to specialized tasks and domains, but fully updating billions of parameters is computationally…