{"paper":{"title":"Circular Orbits in Extremal Reissner Nordstrom Spacetimes","arxiv_id":"1001.0359","primary_cat":"gr-qc","submitted_at":"2010-01-03T11:08:01+00:00","version_compiled":"v2"},"notice":"Every quoted sentence is the authors' text from the arXiv listing abstract. Labels and probabilities are the outputs of classifier-1.13-20260917 on the question bank abstract-p1-20260923, exactly as returned. 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