{"id":"https://openalex.org/W1998493502","doi":"https://doi.org/10.1007/s00153-008-0081-7","title":"Branching in the $${\\Sigma^0_2}$$ -enumeration degrees: a new perspective","display_name":"Branching in the $${\\Sigma^0_2}$$ -enumeration degrees: a new perspective","publication_year":2008,"publication_date":"2008-06-06","ids":{"openalex":"https://openalex.org/W1998493502","doi":"https://doi.org/10.1007/s00153-008-0081-7","mag":"1998493502"},"language":"en","primary_location":{"id":"doi:10.1007/s00153-008-0081-7","is_oa":false,"landing_page_url":"https://doi.org/10.1007/s00153-008-0081-7","pdf_url":null,"source":{"id":"https://openalex.org/S188076996","display_name":"Archive for Mathematical Logic","issn_l":"0933-5846","issn":["0933-5846","1432-0665"],"is_oa":false,"is_in_doaj":false,"is_core":true,"host_organization":"https://openalex.org/P4310319900","host_organization_name":"Springer Science+Business Media","host_organization_lineage":["https://openalex.org/P4310319900","https://openalex.org/P4310319965"],"host_organization_lineage_names":["Springer Science+Business Media","Springer Nature"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Archive for Mathematical Logic","raw_type":"journal-article"},"type":"article","indexed_in":["crossref"],"open_access":{"is_oa":false,"oa_status":"closed","oa_url":null,"any_repository_has_fulltext":false},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5090268187","display_name":"Maria L. Affatato","orcid":null},"institutions":[{"id":"https://openalex.org/I102064193","display_name":"University of Siena","ror":"https://ror.org/01tevnk56","country_code":"IT","type":"education","lineage":["https://openalex.org/I102064193"]}],"countries":["IT"],"is_corresponding":true,"raw_author_name":"Maria L. Affatato","raw_affiliation_strings":["Dipartimento di Scienze Matematiche ed Informatiche \u201cRoberto Magari\u201d, Universit\u00e0 di Siena, Pian dei Mantellini 44, 53100, Siena, Italy","Universit\u00e0 Di Siena"],"affiliations":[{"raw_affiliation_string":"Dipartimento di Scienze Matematiche ed Informatiche \u201cRoberto Magari\u201d, Universit\u00e0 di Siena, Pian dei Mantellini 44, 53100, Siena, Italy","institution_ids":["https://openalex.org/I102064193"]},{"raw_affiliation_string":"Universit\u00e0 Di Siena","institution_ids":["https://openalex.org/I102064193"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5010967359","display_name":"Thomas F. Kent","orcid":null},"institutions":[{"id":"https://openalex.org/I102064193","display_name":"University of Siena","ror":"https://ror.org/01tevnk56","country_code":"IT","type":"education","lineage":["https://openalex.org/I102064193"]}],"countries":["IT"],"is_corresponding":false,"raw_author_name":"Thomas F. Kent","raw_affiliation_strings":["Dipartimento di Scienze Matematiche ed Informatiche \u201cRoberto Magari\u201d, Universit\u00e0 di Siena, Pian dei Mantellini 44, 53100, Siena, Italy","Universit\u00e0 Di Siena"],"affiliations":[{"raw_affiliation_string":"Dipartimento di Scienze Matematiche ed Informatiche \u201cRoberto Magari\u201d, Universit\u00e0 di Siena, Pian dei Mantellini 44, 53100, Siena, Italy","institution_ids":["https://openalex.org/I102064193"]},{"raw_affiliation_string":"Universit\u00e0 Di Siena","institution_ids":["https://openalex.org/I102064193"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5068865870","display_name":"Andrea Sorbi","orcid":"https://orcid.org/0000-0001-9288-3290"},"institutions":[{"id":"https://openalex.org/I102064193","display_name":"University of Siena","ror":"https://ror.org/01tevnk56","country_code":"IT","type":"education","lineage":["https://openalex.org/I102064193"]}],"countries":["IT"],"is_corresponding":false,"raw_author_name":"Andrea Sorbi","raw_affiliation_strings":["Dipartimento di Scienze Matematiche ed Informatiche \u201cRoberto Magari\u201d, Universit\u00e0 di Siena, Pian dei Mantellini 44, 53100, Siena, Italy","Universit\u00e0 Di Siena"],"affiliations":[{"raw_affiliation_string":"Dipartimento di Scienze Matematiche ed Informatiche \u201cRoberto Magari\u201d, Universit\u00e0 di Siena, Pian dei Mantellini 44, 53100, Siena, Italy","institution_ids":["https://openalex.org/I102064193"]},{"raw_affiliation_string":"Universit\u00e0 Di Siena","institution_ids":["https://openalex.org/I102064193"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":3,"corresponding_author_ids":["https://openalex.org/A5090268187"],"corresponding_institution_ids":["https://openalex.org/I102064193"],"apc_list":{"value":2390,"currency":"EUR","value_usd":2990},"apc_paid":null,"fwci":0.0,"has_fulltext":false,"cited_by_count":0,"citation_normalized_percentile":{"value":0.07489975,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":null,"biblio":{"volume":"47","issue":"3","first_page":"221","last_page":"231"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T12002","display_name":"Computability, Logic, AI Algorithms","score":1.0,"subfield":{"id":"https://openalex.org/subfields/1703","display_name":"Computational Theory and Mathematics"},"field":{"id":"https://openalex.org/fields/17","display_name":"Computer Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},"topics":[{"id":"https://openalex.org/T12002","display_name":"Computability, Logic, AI Algorithms","score":1.0,"subfield":{"id":"https://openalex.org/subfields/1703","display_name":"Computational Theory and Mathematics"},"field":{"id":"https://openalex.org/fields/17","display_name":"Computer Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T12072","display_name":"Machine Learning and Algorithms","score":0.9965999722480774,"subfield":{"id":"https://openalex.org/subfields/1702","display_name":"Artificial Intelligence"},"field":{"id":"https://openalex.org/fields/17","display_name":"Computer Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T11269","display_name":"Algorithms and Data Compression","score":0.9957000017166138,"subfield":{"id":"https://openalex.org/subfields/1702","display_name":"Artificial Intelligence"},"field":{"id":"https://openalex.org/fields/17","display_name":"Computer Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/enumeration","display_name":"Enumeration","score":0.9847561717033386},{"id":"https://openalex.org/keywords/sigma","display_name":"Sigma","score":0.8188835382461548},{"id":"https://openalex.org/keywords/mathematics","display_name":"Mathematics","score":0.7998722791671753},{"id":"https://openalex.org/keywords/combinatorics","display_name":"Combinatorics","score":0.6487597823143005},{"id":"https://openalex.org/keywords/perspective","display_name":"Perspective (graphical)","score":0.5670424699783325},{"id":"https://openalex.org/keywords/branching","display_name":"Branching (polymer chemistry)","score":0.5291001796722412},{"id":"https://openalex.org/keywords/degree","display_name":"Degree (music)","score":0.5061530470848083},{"id":"https://openalex.org/keywords/discrete-mathematics","display_name":"Discrete mathematics","score":0.4054883122444153},{"id":"https://openalex.org/keywords/geometry","display_name":"Geometry","score":0.06699851155281067},{"id":"https://openalex.org/keywords/physics","display_name":"Physics","score":0.06649461388587952}],"concepts":[{"id":"https://openalex.org/C156340839","wikidata":"https://www.wikidata.org/wiki/Q2704791","display_name":"Enumeration","level":2,"score":0.9847561717033386},{"id":"https://openalex.org/C2778049214","wikidata":"https://www.wikidata.org/wiki/Q7512234","display_name":"Sigma","level":2,"score":0.8188835382461548},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.7998722791671753},{"id":"https://openalex.org/C114614502","wikidata":"https://www.wikidata.org/wiki/Q76592","display_name":"Combinatorics","level":1,"score":0.6487597823143005},{"id":"https://openalex.org/C12713177","wikidata":"https://www.wikidata.org/wiki/Q1900281","display_name":"Perspective (graphical)","level":2,"score":0.5670424699783325},{"id":"https://openalex.org/C206175624","wikidata":"https://www.wikidata.org/wiki/Q595731","display_name":"Branching (polymer chemistry)","level":2,"score":0.5291001796722412},{"id":"https://openalex.org/C2775997480","wikidata":"https://www.wikidata.org/wiki/Q586277","display_name":"Degree (music)","level":2,"score":0.5061530470848083},{"id":"https://openalex.org/C118615104","wikidata":"https://www.wikidata.org/wiki/Q121416","display_name":"Discrete mathematics","level":1,"score":0.4054883122444153},{"id":"https://openalex.org/C2524010","wikidata":"https://www.wikidata.org/wiki/Q8087","display_name":"Geometry","level":1,"score":0.06699851155281067},{"id":"https://openalex.org/C121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","level":0,"score":0.06649461388587952},{"id":"https://openalex.org/C62520636","wikidata":"https://www.wikidata.org/wiki/Q944","display_name":"Quantum mechanics","level":1,"score":0.0},{"id":"https://openalex.org/C159985019","wikidata":"https://www.wikidata.org/wiki/Q181790","display_name":"Composite material","level":1,"score":0.0},{"id":"https://openalex.org/C24890656","wikidata":"https://www.wikidata.org/wiki/Q82811","display_name":"Acoustics","level":1,"score":0.0},{"id":"https://openalex.org/C192562407","wikidata":"https://www.wikidata.org/wiki/Q228736","display_name":"Materials science","level":0,"score":0.0}],"mesh":[],"locations_count":2,"locations":[{"id":"doi:10.1007/s00153-008-0081-7","is_oa":false,"landing_page_url":"https://doi.org/10.1007/s00153-008-0081-7","pdf_url":null,"source":{"id":"https://openalex.org/S188076996","display_name":"Archive for Mathematical Logic","issn_l":"0933-5846","issn":["0933-5846","1432-0665"],"is_oa":false,"is_in_doaj":false,"is_core":true,"host_organization":"https://openalex.org/P4310319900","host_organization_name":"Springer Science+Business Media","host_organization_lineage":["https://openalex.org/P4310319900","https://openalex.org/P4310319965"],"host_organization_lineage_names":["Springer Science+Business Media","Springer Nature"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Archive for Mathematical Logic","raw_type":"journal-article"},{"id":"pmh:oai:usiena-air.unisi.it:11365/8816","is_oa":false,"landing_page_url":"http://hdl.handle.net/11365/8816","pdf_url":null,"source":{"id":"https://openalex.org/S4377196319","display_name":"Use Siena air (University of Siena)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/I102064193","host_organization_name":"University of Siena","host_organization_lineage":["https://openalex.org/I102064193"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":null,"raw_type":"info:eu-repo/semantics/article"}],"best_oa_location":null,"sustainable_development_goals":[],"awards":[],"funders":[],"has_content":{"grobid_xml":false,"pdf":false},"content_urls":null,"referenced_works_count":17,"referenced_works":["https://openalex.org/W207547410","https://openalex.org/W334685031","https://openalex.org/W2004547606","https://openalex.org/W2006726677","https://openalex.org/W2021872519","https://openalex.org/W2037469541","https://openalex.org/W2037662783","https://openalex.org/W2055472336","https://openalex.org/W2056414301","https://openalex.org/W2057205169","https://openalex.org/W2085994233","https://openalex.org/W2089792255","https://openalex.org/W2110883968","https://openalex.org/W2113444807","https://openalex.org/W2165579787","https://openalex.org/W2616606085","https://openalex.org/W4232277851"],"related_works":["https://openalex.org/W108845024","https://openalex.org/W57712237","https://openalex.org/W2578985712","https://openalex.org/W4300125793","https://openalex.org/W2406961474","https://openalex.org/W2143566611","https://openalex.org/W2013740965","https://openalex.org/W588267724","https://openalex.org/W2952598754","https://openalex.org/W2289300403"],"abstract_inverted_index":null,"counts_by_year":[],"updated_date":"2025-11-06T03:46:38.306776","created_date":"2016-06-24T00:00:00"}
