{"id":"W2041372701","doi":"10.1002/qua.560220832","title":"Fourth-order constant denominator perturbation theory","year":2009,"lang":"en","type":"article","venue":"International Journal of Quantum Chemistry","topic":"Advanced Chemical Physics Studies","field":"Physics and Astronomy","cited_by":1,"is_retracted":false,"has_abstract":true,"ca_institutions":"University of Guelph","funders":"","keywords":"Hamiltonian (control theory); Degenerate energy levels; Wave function; Perturbation theory (quantum mechanics); CNDO/2; Perturbation (astronomy); Quantum mechanics; Physics; Mathematics; Statistical physics; Molecule","routes":{"ca_aff":true,"ca_fund":false,"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":[0.000977073,0.0009024591,0.001062049,0.001511563,0.0009623028,0.001537899,0.002680242,0.000980364,0.007760719],"category_scores_gemma":[0.00190559,0.0003563141,0.0009280129,0.001132854,0.001560719,0.001872206,0.001451459,0.002172608,0.001793865],"about_ca_system_candidate":false,"about_ca_system_consensus":false,"about_ca_system_score_codex":0.001674902,"about_ca_system_score_gemma":0.001040818,"about_ca_topic_candidate":false,"about_ca_topic_consensus":false,"about_ca_topic_score_codex":0.001793664,"about_ca_topic_score_gemma":0.001336307,"domain_scores_codex":[0.9991774,0.0002296785,0.00002134738,0.00007859613,0.0004085293,0.00008444511],"domain_scores_gemma":[0.9991071,0.0002587261,0.00005859493,0.0002513156,0.0002572643,0.0000669629],"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":[0.00001549924,0.00001972394,0.00009580299,0.00005126219,0.00001065233,0.00009058032,0.00007542351,0.05146834,0.001746154,0.9392788,0.001420284,0.005727424],"study_design_scores_gemma":[0.000007353916,0.00001798166,0.00008023316,0.00001257761,0.000003850916,0.00006309933,0.00002388582,0.4885553,0.001047434,0.506087,0.004083007,0.00001831224],"study_design_candidate":"theoretical_or_conceptual","study_design_consensus":"theoretical_or_conceptual","genre_codex":"methods","genre_gemma":"methods","genre_scores_codex":[0.0137142,0.0004270637,0.9256325,0.0004678533,0.0002777367,0.000069117,0.0001541021,0.0004253976,0.05883187],"genre_scores_gemma":[0.5655629,0.001542202,0.3355031,0.0007286114,0.0003880462,0.0005259946,0.0004887469,0.001242691,0.09401777],"genre_candidate":"methods","genre_consensus":"methods","teacher_disagreement_score":0.007760719,"threshold_uncertainty_score":0.02596223,"prediction_status":"machine_predicted_unvalidated"},"machine_scores":{"provisional":true,"baseline":true,"maturity_gate_passed":false,"score_opus":0.007504514115937977,"score_gpt":0.2664453576098278,"score_spread":0.2589408434938898,"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."}}