{"id":"https://openalex.org/W2084131533","doi":"https://doi.org/10.1016/0097-3165(87)90061-6","title":"Counting unlabeled structures","display_name":"Counting unlabeled structures","publication_year":1987,"publication_date":"1987-01-01","ids":{"openalex":"https://openalex.org/W2084131533","doi":"https://doi.org/10.1016/0097-3165(87)90061-6","mag":"2084131533"},"language":"en","primary_location":{"id":"doi:10.1016/0097-3165(87)90061-6","is_oa":false,"landing_page_url":"https://doi.org/10.1016/0097-3165(87)90061-6","pdf_url":null,"source":{"id":"https://openalex.org/S128556326","display_name":"Journal of Combinatorial Theory Series A","issn_l":"0097-3165","issn":["0097-3165","1096-0899"],"is_oa":false,"is_in_doaj":false,"is_core":true,"host_organization":"https://openalex.org/P4310320990","host_organization_name":"Elsevier BV","host_organization_lineage":["https://openalex.org/P4310320990"],"host_organization_lineage_names":["Elsevier BV"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Journal of Combinatorial Theory, Series A","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/A5072637221","display_name":"Hans J\u00fcrgen Pr\u00f6mel","orcid":null},"institutions":[{"id":"https://openalex.org/I135140700","display_name":"University of Bonn","ror":"https://ror.org/041nas322","country_code":"DE","type":"education","lineage":["https://openalex.org/I135140700"]}],"countries":["DE"],"is_corresponding":true,"raw_author_name":"Hans J\u00fcrgen Pr\u00f6mel","raw_affiliation_strings":["Institut f\u00fcr Operations Research, Rheinische Friedrich-Wilhelms Universit\u00e4t Bonn, D-5300 Bonn 1, West Germany","Rheinische Friedrech-Wilhelms Univ.,Bonn, W.Germany"],"affiliations":[{"raw_affiliation_string":"Institut f\u00fcr Operations Research, Rheinische Friedrich-Wilhelms Universit\u00e4t Bonn, D-5300 Bonn 1, West Germany","institution_ids":["https://openalex.org/I135140700"]},{"raw_affiliation_string":"Rheinische Friedrech-Wilhelms Univ.,Bonn, W.Germany","institution_ids":["https://openalex.org/I135140700"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":1,"corresponding_author_ids":["https://openalex.org/A5072637221"],"corresponding_institution_ids":["https://openalex.org/I135140700"],"apc_list":{"value":3320,"currency":"USD","value_usd":3320},"apc_paid":null,"fwci":1.6017,"has_fulltext":false,"cited_by_count":22,"citation_normalized_percentile":{"value":0.83284024,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":89,"max":94},"biblio":{"volume":"44","issue":"1","first_page":"83","last_page":"93"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10374","display_name":"Advanced Graph Theory Research","score":0.9775999784469604,"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/T10374","display_name":"Advanced Graph Theory Research","score":0.9775999784469604,"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/T11830","display_name":"Point processes and geometric inequalities","score":0.9205999970436096,"subfield":{"id":"https://openalex.org/subfields/2604","display_name":"Applied Mathematics"},"field":{"id":"https://openalex.org/fields/26","display_name":"Mathematics"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/mathematics","display_name":"Mathematics","score":0.8168189525604248},{"id":"https://openalex.org/keywords/combinatorics","display_name":"Combinatorics","score":0.6456094980239868},{"id":"https://openalex.org/keywords/automorphism","display_name":"Automorphism","score":0.550035297870636},{"id":"https://openalex.org/keywords/graph","display_name":"Graph","score":0.5196729898452759},{"id":"https://openalex.org/keywords/class","display_name":"Class (philosophy)","score":0.5140672922134399},{"id":"https://openalex.org/keywords/discrete-mathematics","display_name":"Discrete mathematics","score":0.39152634143829346},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.08558028936386108},{"id":"https://openalex.org/keywords/artificial-intelligence","display_name":"Artificial intelligence","score":0.05047306418418884}],"concepts":[{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.8168189525604248},{"id":"https://openalex.org/C114614502","wikidata":"https://www.wikidata.org/wiki/Q76592","display_name":"Combinatorics","level":1,"score":0.6456094980239868},{"id":"https://openalex.org/C118712358","wikidata":"https://www.wikidata.org/wiki/Q782566","display_name":"Automorphism","level":2,"score":0.550035297870636},{"id":"https://openalex.org/C132525143","wikidata":"https://www.wikidata.org/wiki/Q141488","display_name":"Graph","level":2,"score":0.5196729898452759},{"id":"https://openalex.org/C2777212361","wikidata":"https://www.wikidata.org/wiki/Q5127848","display_name":"Class (philosophy)","level":2,"score":0.5140672922134399},{"id":"https://openalex.org/C118615104","wikidata":"https://www.wikidata.org/wiki/Q121416","display_name":"Discrete mathematics","level":1,"score":0.39152634143829346},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.08558028936386108},{"id":"https://openalex.org/C154945302","wikidata":"https://www.wikidata.org/wiki/Q11660","display_name":"Artificial intelligence","level":1,"score":0.05047306418418884}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1016/0097-3165(87)90061-6","is_oa":false,"landing_page_url":"https://doi.org/10.1016/0097-3165(87)90061-6","pdf_url":null,"source":{"id":"https://openalex.org/S128556326","display_name":"Journal of Combinatorial Theory Series A","issn_l":"0097-3165","issn":["0097-3165","1096-0899"],"is_oa":false,"is_in_doaj":false,"is_core":true,"host_organization":"https://openalex.org/P4310320990","host_organization_name":"Elsevier BV","host_organization_lineage":["https://openalex.org/P4310320990"],"host_organization_lineage_names":["Elsevier BV"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Journal of Combinatorial Theory, Series A","raw_type":"journal-article"}],"best_oa_location":null,"sustainable_development_goals":[],"awards":[],"funders":[],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":13,"referenced_works":["https://openalex.org/W1550603695","https://openalex.org/W1974159979","https://openalex.org/W1995916222","https://openalex.org/W2018883342","https://openalex.org/W2024244453","https://openalex.org/W2064841070","https://openalex.org/W2068789164","https://openalex.org/W2076048718","https://openalex.org/W2085536555","https://openalex.org/W2089544611","https://openalex.org/W2092341760","https://openalex.org/W2799061192","https://openalex.org/W4235934183"],"related_works":["https://openalex.org/W2114124567","https://openalex.org/W2998724919","https://openalex.org/W161787318","https://openalex.org/W1997883919","https://openalex.org/W1968682565","https://openalex.org/W2963982375","https://openalex.org/W2042372008","https://openalex.org/W2376326551","https://openalex.org/W3122198505","https://openalex.org/W4221160447"],"abstract_inverted_index":null,"counts_by_year":[{"year":2020,"cited_by_count":1},{"year":2017,"cited_by_count":1},{"year":2016,"cited_by_count":1},{"year":2014,"cited_by_count":1}],"updated_date":"2026-04-05T17:49:38.594831","created_date":"2025-10-10T00:00:00"}