Everything below is the live state of engineering infrastructure: arXiv metadata (no full texts) and a concept-paper graph. Links are generated automatically by keyword matching over titles and abstracts — unreviewed, for research indexing only.
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Concept domains
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Linked papers
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Concept-paper edges
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Preprints in DB
AConcept domains
17 standard mathematical concept domains, trilingual. The search interface (MCP search_topic) traverses linked papers per concept.