{"id":"W1501119298","doi":"10.70930/tac/4imw7mvg","title":"The span construction","year":2010,"lang":"en","type":"article","venue":"Theory and applications of categories","topic":"Homotopy and Cohomology in Algebraic Topology","field":"Mathematics","cited_by":22,"is_retracted":false,"has_abstract":true,"ca_institutions":"","funders":"Natural Sciences and Engineering Research Council of Canada; Macquarie University","keywords":"Mathematics; Functor; Span (engineering); Adjoint functors; Pure mathematics; Concrete category; Property (philosophy); Closed category; Functor category; Arrow; Generalization; Computer science; Mathematical analysis","routes":{"ca_aff":false,"ca_fund":true,"ca_venue":true,"about_ca":false,"invisible_to_affiliation_only":true},"retraction":null,"screen":null,"direct_labels":[],"prediction":{"model_version":"metacan-v3-hybrid-931329e0061c","candidate_categories":[],"consensus_categories":[],"category_scores_codex":[0.001023903,0.0004865992,0.0003967862,0.001233198,0.001305195,0.001708382,0.0007438148,0.000621402,0.01302257],"category_scores_gemma":[0.001178684,0.0003505034,0.0007144354,0.0007503289,0.002401134,0.006265346,0.005944917,0.001526817,0.002007931],"about_ca_system_candidate":false,"about_ca_system_consensus":false,"about_ca_system_score_codex":0.000529942,"about_ca_system_score_gemma":0.0004120276,"about_ca_topic_candidate":false,"about_ca_topic_consensus":false,"about_ca_topic_score_codex":0.0005289112,"about_ca_topic_score_gemma":0.0004319149,"domain_scores_codex":[0.9991283,0.0002201238,0.00004540311,0.0001963601,0.0002248669,0.0001849757],"domain_scores_gemma":[0.9994554,0.0001191906,0.00004376769,0.0001698034,0.0001018566,0.0001100777],"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":[0.000013571,0.000009171245,0.0003309234,0.00004375001,0.000006521193,0.00009828651,0.0003807155,0.0002682997,0.001162334,0.9779072,0.001659693,0.01811947],"study_design_scores_gemma":[0.000009723925,0.00005787677,0.0006818278,0.0000419729,0.0000192335,0.0006248742,0.0003014451,0.002816416,0.003323257,0.8686445,0.1234546,0.00002437562],"study_design_candidate":"theoretical_or_conceptual","study_design_consensus":"theoretical_or_conceptual","genre_codex":"methods","genre_gemma":"empirical","genre_scores_codex":[0.06717505,0.002013838,0.7075857,0.001701598,0.0006480306,0.0001069264,0.000550445,0.001514545,0.2187039],"genre_scores_gemma":[0.7909098,0.002219929,0.1406006,0.001180093,0.0006554386,0.000232454,0.0007600582,0.0005227227,0.0629189],"genre_candidate":"empirical","genre_consensus":null,"teacher_disagreement_score":0.01302257,"threshold_uncertainty_score":0.04356486,"prediction_status":"machine_predicted_unvalidated"},"machine_scores":{"provisional":true,"baseline":true,"maturity_gate_passed":false,"score_opus":0.009139324794342445,"score_gpt":0.2757518704539239,"score_spread":0.2666125456595815,"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."}}