{"id":"https://openalex.org/W2000288063","doi":"https://doi.org/10.1007/bf01916906","title":"On a classification of independence systems","display_name":"On a classification of independence systems","publication_year":1983,"publication_date":"1983-12-01","ids":{"openalex":"https://openalex.org/W2000288063","doi":"https://doi.org/10.1007/bf01916906","mag":"2000288063"},"language":"de","primary_location":{"id":"doi:10.1007/bf01916906","is_oa":false,"landing_page_url":"https://doi.org/10.1007/bf01916906","pdf_url":null,"source":{"id":"https://openalex.org/S126160977","display_name":"Mathematical Methods of Operations Research","issn_l":"1432-2994","issn":["1432-2994","1432-5217"],"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":"Zeitschrift f\u00fcr Operations Research","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/A5070912266","display_name":"Reinhardt Euler","orcid":"https://orcid.org/0000-0002-4294-286X"},"institutions":[{"id":"https://openalex.org/I180923762","display_name":"University of Cologne","ror":"https://ror.org/00rcxh774","country_code":"DE","type":"education","lineage":["https://openalex.org/I180923762"]}],"countries":["DE"],"is_corresponding":true,"raw_author_name":"R. Euler","raw_affiliation_strings":["Mathematisches Institut der Universit\u00e4t zu K\u00f6ln, Weyertal 86, D-5000, K\u00f6ln 41","Mathematisches Institut der Universit\u00e4t zu K\u00f6ln"],"affiliations":[{"raw_affiliation_string":"Mathematisches Institut der Universit\u00e4t zu K\u00f6ln, Weyertal 86, D-5000, K\u00f6ln 41","institution_ids":["https://openalex.org/I180923762"]},{"raw_affiliation_string":"Mathematisches Institut der Universit\u00e4t zu K\u00f6ln","institution_ids":["https://openalex.org/I180923762"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":1,"corresponding_author_ids":["https://openalex.org/A5070912266"],"corresponding_institution_ids":["https://openalex.org/I180923762"],"apc_list":{"value":2290,"currency":"EUR","value_usd":2890},"apc_paid":null,"fwci":0.5711,"has_fulltext":false,"cited_by_count":3,"citation_normalized_percentile":{"value":0.61138512,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":null,"biblio":{"volume":"27","issue":"1","first_page":"123","last_page":"136"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T11727","display_name":"Advanced Algebra and Logic","score":0.9442999958992004,"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/T11727","display_name":"Advanced Algebra and Logic","score":0.9442999958992004,"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/T11063","display_name":"Rough Sets and Fuzzy Logic","score":0.9409999847412109,"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"}}],"keywords":[{"id":"https://openalex.org/keywords/matroid","display_name":"Matroid","score":0.9238500595092773},{"id":"https://openalex.org/keywords/independence","display_name":"Independence (probability theory)","score":0.7334993481636047},{"id":"https://openalex.org/keywords/vertex","display_name":"Vertex (graph theory)","score":0.6470863819122314},{"id":"https://openalex.org/keywords/travelling-salesman-problem","display_name":"Travelling salesman problem","score":0.615743100643158},{"id":"https://openalex.org/keywords/intersection","display_name":"Intersection (aeronautics)","score":0.545667827129364},{"id":"https://openalex.org/keywords/combinatorics","display_name":"Combinatorics","score":0.5112109184265137},{"id":"https://openalex.org/keywords/combinatorial-optimization","display_name":"Combinatorial optimization","score":0.466564804315567},{"id":"https://openalex.org/keywords/mathematics","display_name":"Mathematics","score":0.45654818415641785},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.42334675788879395},{"id":"https://openalex.org/keywords/theoretical-computer-science","display_name":"Theoretical computer science","score":0.3664017915725708},{"id":"https://openalex.org/keywords/discrete-mathematics","display_name":"Discrete mathematics","score":0.35568180680274963},{"id":"https://openalex.org/keywords/graph","display_name":"Graph","score":0.3006364703178406},{"id":"https://openalex.org/keywords/mathematical-optimization","display_name":"Mathematical optimization","score":0.2918305993080139},{"id":"https://openalex.org/keywords/geography","display_name":"Geography","score":0.12073227763175964},{"id":"https://openalex.org/keywords/statistics","display_name":"Statistics","score":0.07711556553840637},{"id":"https://openalex.org/keywords/cartography","display_name":"Cartography","score":0.06824550032615662}],"concepts":[{"id":"https://openalex.org/C106286213","wikidata":"https://www.wikidata.org/wiki/Q898572","display_name":"Matroid","level":2,"score":0.9238500595092773},{"id":"https://openalex.org/C35651441","wikidata":"https://www.wikidata.org/wiki/Q625303","display_name":"Independence (probability theory)","level":2,"score":0.7334993481636047},{"id":"https://openalex.org/C80899671","wikidata":"https://www.wikidata.org/wiki/Q1304193","display_name":"Vertex (graph theory)","level":3,"score":0.6470863819122314},{"id":"https://openalex.org/C175859090","wikidata":"https://www.wikidata.org/wiki/Q322212","display_name":"Travelling salesman problem","level":2,"score":0.615743100643158},{"id":"https://openalex.org/C64543145","wikidata":"https://www.wikidata.org/wiki/Q162942","display_name":"Intersection (aeronautics)","level":2,"score":0.545667827129364},{"id":"https://openalex.org/C114614502","wikidata":"https://www.wikidata.org/wiki/Q76592","display_name":"Combinatorics","level":1,"score":0.5112109184265137},{"id":"https://openalex.org/C52692508","wikidata":"https://www.wikidata.org/wiki/Q1333872","display_name":"Combinatorial optimization","level":2,"score":0.466564804315567},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.45654818415641785},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.42334675788879395},{"id":"https://openalex.org/C80444323","wikidata":"https://www.wikidata.org/wiki/Q2878974","display_name":"Theoretical computer science","level":1,"score":0.3664017915725708},{"id":"https://openalex.org/C118615104","wikidata":"https://www.wikidata.org/wiki/Q121416","display_name":"Discrete mathematics","level":1,"score":0.35568180680274963},{"id":"https://openalex.org/C132525143","wikidata":"https://www.wikidata.org/wiki/Q141488","display_name":"Graph","level":2,"score":0.3006364703178406},{"id":"https://openalex.org/C126255220","wikidata":"https://www.wikidata.org/wiki/Q141495","display_name":"Mathematical optimization","level":1,"score":0.2918305993080139},{"id":"https://openalex.org/C205649164","wikidata":"https://www.wikidata.org/wiki/Q1071","display_name":"Geography","level":0,"score":0.12073227763175964},{"id":"https://openalex.org/C105795698","wikidata":"https://www.wikidata.org/wiki/Q12483","display_name":"Statistics","level":1,"score":0.07711556553840637},{"id":"https://openalex.org/C58640448","wikidata":"https://www.wikidata.org/wiki/Q42515","display_name":"Cartography","level":1,"score":0.06824550032615662}],"mesh":[],"locations_count":2,"locations":[{"id":"doi:10.1007/bf01916906","is_oa":false,"landing_page_url":"https://doi.org/10.1007/bf01916906","pdf_url":null,"source":{"id":"https://openalex.org/S126160977","display_name":"Mathematical Methods of Operations Research","issn_l":"1432-2994","issn":["1432-2994","1432-5217"],"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":"Zeitschrift f\u00fcr Operations Research","raw_type":"journal-article"},{"id":"pmh:oai:HAL:hal-01137359v1","is_oa":false,"landing_page_url":"https://hal.univ-brest.fr/hal-01137359","pdf_url":null,"source":{"id":"https://openalex.org/S4306402512","display_name":"HAL (Le Centre pour la Communication Scientifique Directe)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/I1294671590","host_organization_name":"Centre National de la Recherche Scientifique","host_organization_lineage":["https://openalex.org/I1294671590"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"Mathematical Methods of Operations Research, 1983, 27 (1), pp.123-136","raw_type":"Journal articles"}],"best_oa_location":null,"sustainable_development_goals":[{"score":0.47999998927116394,"id":"https://metadata.un.org/sdg/8","display_name":"Decent work and economic growth"}],"awards":[],"funders":[{"id":"https://openalex.org/F4320324811","display_name":"Universit\u00e4t zu K\u00f6ln","ror":"https://ror.org/00rcxh774"}],"has_content":{"grobid_xml":false,"pdf":false},"content_urls":null,"referenced_works_count":4,"referenced_works":["https://openalex.org/W1963707128","https://openalex.org/W2001258629","https://openalex.org/W2037988115","https://openalex.org/W2125690626"],"related_works":["https://openalex.org/W2572756133","https://openalex.org/W1563568831","https://openalex.org/W2135149549","https://openalex.org/W4294358747","https://openalex.org/W1604040598","https://openalex.org/W2946024655","https://openalex.org/W2861856156","https://openalex.org/W2146364482","https://openalex.org/W2758988501","https://openalex.org/W4236147943"],"abstract_inverted_index":null,"counts_by_year":[],"updated_date":"2026-04-05T17:49:38.594831","created_date":"2025-10-10T00:00:00"}
