{"id":"W4408111764","doi":"10.1088/1361-6382/adbc3f","title":"C-metric in a (nut)shell","year":2025,"lang":"en","type":"article","venue":"Classical and Quantum Gravity","topic":"Algebraic and Geometric Analysis","field":"Mathematics","cited_by":2,"is_retracted":false,"has_abstract":true,"ca_institutions":"Perimeter Institute; University of Waterloo","funders":"Engineering and Physical Sciences Research Council; Natural Sciences and Engineering Research Council of Canada","keywords":"Physics; Nut; Metric (unit); Shell (structure); Mathematical physics; Theoretical physics; Composite material","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":"codex-gemma-dda1882f352a","candidate_categories":[],"consensus_categories":[],"category_scores_codex":[0.0003852821,0.0001362674,0.000378979,0.0005593933,0.00008017192,0.00002772497,0.0001249974,0.0001274661,0.00005301001],"category_scores_gemma":[0.0009936846,0.00010569,0.0001035834,0.002656378,0.0001357549,0.00005059693,0.0001050053,0.0002487864,0.00002456225],"about_ca_system_candidate":false,"about_ca_system_consensus":false,"about_ca_system_score_codex":0.00004228931,"about_ca_system_score_gemma":0.00003785051,"about_ca_topic_candidate":false,"about_ca_topic_consensus":false,"about_ca_topic_score_codex":0.00005157615,"about_ca_topic_score_gemma":0.00006549052,"domain_scores_codex":[0.9989385,0.00007294143,0.0002912763,0.0002870157,0.0001617765,0.0002485144],"domain_scores_gemma":[0.9988028,0.0008027285,0.00005424662,0.0002168706,0.00003636585,0.00008702277],"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":[0.00002893024,0.0003748345,0.03598338,0.0001025178,0.00005212866,0.00001830782,0.00006635592,4.613206e-7,0.00003284862,0.9317283,0.009380634,0.02223127],"study_design_scores_gemma":[0.0005313219,0.00004447479,0.05954651,0.00003630299,0.00008264945,0.000001895691,0.0001180581,0.003039513,0.00003959714,0.9265217,0.009880899,0.0001571356],"study_design_candidate":"theoretical_or_conceptual","study_design_consensus":"theoretical_or_conceptual","genre_codex":"empirical","genre_gemma":"empirical","genre_scores_codex":[0.9766922,0.0008070459,0.01209665,0.002187331,0.0001169935,0.0001476857,0.000005845824,0.00006219101,0.007884029],"genre_scores_gemma":[0.9936976,0.00007766617,0.0004370769,0.0001865659,0.00002909811,0.000009352212,0.000002479355,0.000005853396,0.005554243],"genre_candidate":"empirical","genre_consensus":"empirical","teacher_disagreement_score":0.02356313,"threshold_uncertainty_score":0.4309911,"prediction_status":"machine_predicted_unvalidated"},"machine_scores":{"provisional":true,"baseline":true,"maturity_gate_passed":false,"score_opus":0.0244358894498739,"score_gpt":0.3113280828222778,"score_spread":0.2868921933724038,"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."}}