{"id":"W3138640971","doi":"10.1140/epjc/s10052-021-09040-9","title":"Vaidya geometries and scalar fields with null gradients","year":2021,"lang":"en","type":"article","venue":"The European Physical Journal C","topic":"Cosmology and Gravitation Theories","field":"Physics and Astronomy","cited_by":11,"is_retracted":false,"has_abstract":true,"ca_institutions":"Bishop's University","funders":"Gruppo Nazionale per la Fisica Matematica; Canadian Network for Research and Innovation in Machining Technology, Natural Sciences and Engineering Research Council of Canada; Bishop's University; Istituto Nazionale di Alta Matematica \"Francesco Severi\"","keywords":"Physics; Scalar field; Null (SQL); Geodesic; Mathematical physics; Scalar theories of gravitation; Scalar (mathematics); Congruence (geometry); Massless particle; Classical mechanics; Geodesics in general relativity; Einstein; General relativity; Classical field theory; Mathematical analysis; Geometry; Mathematics","routes":{"ca_aff":true,"ca_fund":true,"ca_venue":false,"about_ca":false,"invisible_to_affiliation_only":false},"retraction":null,"screen":null,"direct_labels":[],"prediction":{"model_version":"metacan-v3-hybrid-931329e0061c","candidate_categories":[],"consensus_categories":[],"category_scores_codex":[0.0002569396,0.0004396818,0.0002138643,0.0007077037,0.0009839138,0.001431645,0.0002883938,0.0005897679,0.001716017],"category_scores_gemma":[0.000980373,0.0002297712,0.0003029532,0.0002491945,0.001995586,0.001655785,0.001378209,0.0008439256,0.0002756397],"about_ca_system_candidate":false,"about_ca_system_consensus":false,"about_ca_system_score_codex":0.0005600191,"about_ca_system_score_gemma":0.0004150736,"about_ca_topic_candidate":false,"about_ca_topic_consensus":false,"about_ca_topic_score_codex":0.000912462,"about_ca_topic_score_gemma":0.0007162477,"domain_scores_codex":[0.9998093,0.00005572731,0.000009971652,0.0000370595,0.00004648023,0.00004143028],"domain_scores_gemma":[0.9996386,0.00006064686,0.0001039218,0.00003368566,0.00005638759,0.0001068622],"domain_codex":null,"domain_gemma":null,"domain_candidate":null,"domain_consensus":null,"study_design_codex":"theoretical_or_conceptual","study_design_gemma":"theoretical_or_conceptual","study_design_scores_codex":[0.000007588731,0.000002415479,0.0002143024,0.000007419034,0.000001739292,0.00007200777,0.0001010755,0.0003156637,0.0008048093,0.9973636,0.0002638473,0.0008455606],"study_design_scores_gemma":[0.00003328792,0.00003864992,0.001182934,0.0000180952,0.00000512918,0.0004797263,0.0002555326,0.00546719,0.000896398,0.9860085,0.005598656,0.00001601354],"study_design_candidate":"theoretical_or_conceptual","study_design_consensus":"theoretical_or_conceptual","genre_codex":"empirical","genre_gemma":"empirical","genre_scores_codex":[0.8064317,0.001188629,0.05975821,0.002936178,0.0003048707,0.0000419579,0.0001550091,0.0001245177,0.129059],"genre_scores_gemma":[0.9783398,0.0004203128,0.01064912,0.0001973816,0.0001053288,0.00002810174,0.00008017848,0.00002855179,0.01015125],"genre_candidate":"empirical","genre_consensus":"empirical","teacher_disagreement_score":0.001716017,"threshold_uncertainty_score":0.005740643,"prediction_status":"machine_predicted_unvalidated"},"machine_scores":{"provisional":true,"baseline":true,"maturity_gate_passed":false,"score_opus":0.007493993024794822,"score_gpt":0.2269626704692704,"score_spread":0.2194686774444756,"validation_status":"score_only:v0-immature-baseline","note":"Baseline scores from an immature model (maturity gate not passed). Scores rank; they never assert a category."}}