LECTOR: Joint Optimization of Scientific Reasoning Graphs and Introduction Generation

• URL: http://arxiv.org/abs/2605.25964v1
• Date: Mon, 25 May 2026 15:41:16 GMT
• Title: LECTOR: Joint Optimization of Scientific Reasoning Graphs and Introduction Generation
• Abstract summary: Introduction writing is especially challenging, which demands logical soundness and verifiable faithfulness.<n>Most AI-assisted methods treat the task as text generation instead of reasoning and structuring, leading to severe drawbacks.<n>We propose LECTOR, a novel Logic-Expression Co-Reinforcement Learning framework that can strictly follow the scientist's logic, add high-quality citations and keep structured expressions.
• Score: 57.70907667652966
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: AI Scientists have shown promising progress across multiple stages of the research pipeline, among which automatic scientific paper writing remains a formidable challenge. The Introduction writing is especially challenging, which demands not only linguistic fluency, but logical soundness and verifiable faithfulness. Most AI-assisted methods treat the task as text generation instead of reasoning and structuring, leading to severe drawbacks, e.g., hallucinating citations. To address this, we first formulate the Content-Conditional Introduction Generation (CCIG) task, which requires grounding the Introduction in the paper's core evidence. We then propose LECTOR, a novel Logic-Expression Co-Reinforcement Learning framework that can strictly follow the scientist's logic, add high-quality citations and keep structured expressions. LECTOR first constructs a logic-reasoning graph from the paper's main body to serve as a verifiable logical blueprint. Subsequently, it employs a Logic-Expression Co-Rewarding mechanism to jointly optimize for both the graph's structural fidelity and the final narrative's quality. We conduct a dataset from Nature Communications papers to assess our method. Extensive experiments show consistent improvements in both logic fidelity and Introduction generation quality metrics, e.g., Graph Quality (+26.7%), Citation Quality (+8.6%), and Paper Consistency (+3.3%). Code and data are available at https://github.com/Xiao-Youth/LECTOR.

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