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Ran Xin

4 accepted papers

2026

Scaling up Multi-Turn Off-Policy RL and Multi-Agent Tree Search for LLM Step-Provers

ICML 2026poster

The integration of Large Language Models (LLMs) with automated theorem proving has shown immense promise, yet is constrained by challenges in scaling up both training-time reinforcement learning (RL) and inference-time compute. This paper introduces BFS-Prover-V2, a step-level theorem proving system…

Cited by 0SourceScholar
2025

BFS-Prover: Scalable Best-First Tree Search for LLM-based Automatic Theorem Proving

ACL 2025long

Recent advancements in large language models (LLMs) have spurred growing interest in automatic theorem proving using Lean4, where effective tree search methods are crucial for navigating the underlying large proof search spaces. While the existing approaches primarily rely on value functions and/or…

Cited by 0SourcePDFScholar
2021

A Decentralized Variance-Reduced Method for Stochastic Optimization Over Directed Graphs

ICASSP 2021accepted

In this paper, we propose a decentralized first-order stochastic optimization method Push-SAGA for finite-sum minimization over a strongly connected directed graph. This method features local variance reduction to remove the uncertainty caused by random sampling of the local gradients, global gradie…

Cited by 4SourceScholar
2021

A Hybrid Variance-Reduced Method for Decentralized Stochastic Non-Convex Optimization

ICML 2021spotlight

This paper considers decentralized stochastic optimization over a network of $n$ nodes, where each node possesses a smooth non-convex local cost function and the goal of the networked nodes is to find an $\epsilon$-accurate first-order stationary point of the sum of the local costs. We focus on an o…

Cited by 46SourcePDFScholar