{"id":"https://openalex.org/W2141517371","doi":"https://doi.org/10.1016/0012-365x(95)00217-k","title":"A Helly theorem in weakly modular space","display_name":"A Helly theorem in weakly modular space","publication_year":1996,"publication_date":"1996-11-01","ids":{"openalex":"https://openalex.org/W2141517371","doi":"https://doi.org/10.1016/0012-365x(95)00217-k","mag":"2141517371"},"language":"en","primary_location":{"id":"doi:10.1016/0012-365x(95)00217-k","is_oa":false,"landing_page_url":"https://doi.org/10.1016/0012-365x(95)00217-k","pdf_url":null,"source":{"id":"https://openalex.org/S18902827","display_name":"Discrete Mathematics","issn_l":"0012-365X","issn":["0012-365X","1872-681X"],"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":"Discrete Mathematics","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/A5109005775","display_name":"Hans\u2010J\u00fcrgen Bandelt","orcid":null},"institutions":[{"id":"https://openalex.org/I159176309","display_name":"Universit\u00e4t Hamburg","ror":"https://ror.org/00g30e956","country_code":"DE","type":"education","lineage":["https://openalex.org/I159176309"]}],"countries":["DE"],"is_corresponding":true,"raw_author_name":"Hans-J\u00fcrgen Bandelt","raw_affiliation_strings":["Mathematisches Seminar, Universit\u00e4t Hamburg, D-20146 Hamburg, Germany","Mathematisches Seminar, Universit\u00e4t Hamburg, D\u201020146 Hamburg, Germany"],"affiliations":[{"raw_affiliation_string":"Mathematisches Seminar, Universit\u00e4t Hamburg, D-20146 Hamburg, Germany","institution_ids":["https://openalex.org/I159176309"]},{"raw_affiliation_string":"Mathematisches Seminar, Universit\u00e4t Hamburg, D\u201020146 Hamburg, Germany","institution_ids":["https://openalex.org/I159176309"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5033947410","display_name":"Victor Chepoi","orcid":"https://orcid.org/0000-0002-0481-7312"},"institutions":[{"id":"https://openalex.org/I29920723","display_name":"Moldova State University","ror":"https://ror.org/0475kvb92","country_code":"MD","type":"education","lineage":["https://openalex.org/I29920723"]}],"countries":["MD"],"is_corresponding":false,"raw_author_name":"Victor Chepoi","raw_affiliation_strings":["Catedra de Cibernetic\u01ce Matematic\u01ce, Universitatea de Stat din Moldova, 277009 Chi\u015fin\u01ceu, Moldova"],"affiliations":[{"raw_affiliation_string":"Catedra de Cibernetic\u01ce Matematic\u01ce, Universitatea de Stat din Moldova, 277009 Chi\u015fin\u01ceu, Moldova","institution_ids":["https://openalex.org/I29920723"]}]}],"institutions":[],"countries_distinct_count":2,"institutions_distinct_count":2,"corresponding_author_ids":["https://openalex.org/A5109005775"],"corresponding_institution_ids":["https://openalex.org/I159176309"],"apc_list":{"value":3000,"currency":"USD","value_usd":3000},"apc_paid":null,"fwci":2.0615,"has_fulltext":false,"cited_by_count":57,"citation_normalized_percentile":{"value":0.87790175,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":89,"max":99},"biblio":{"volume":"160","issue":"1-3","first_page":"25","last_page":"39"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10374","display_name":"Advanced Graph Theory Research","score":0.9976000189781189,"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":0.9976000189781189,"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/T10996","display_name":"Computational Geometry and Mesh Generation","score":0.9959999918937683,"subfield":{"id":"https://openalex.org/subfields/1704","display_name":"Computer Graphics and Computer-Aided Design"},"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/T10720","display_name":"Complexity and Algorithms in Graphs","score":0.989300012588501,"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/mathematics","display_name":"Mathematics","score":0.8677787780761719},{"id":"https://openalex.org/keywords/combinatorics","display_name":"Combinatorics","score":0.7175545692443848},{"id":"https://openalex.org/keywords/convexity","display_name":"Convexity","score":0.6857357025146484},{"id":"https://openalex.org/keywords/geodesic","display_name":"Geodesic","score":0.5764609575271606},{"id":"https://openalex.org/keywords/metric-space","display_name":"Metric space","score":0.5578488111495972},{"id":"https://openalex.org/keywords/discrete-mathematics","display_name":"Discrete mathematics","score":0.5441535115242004},{"id":"https://openalex.org/keywords/split-graph","display_name":"Split graph","score":0.441322386264801},{"id":"https://openalex.org/keywords/modular-design","display_name":"Modular design","score":0.410036563873291},{"id":"https://openalex.org/keywords/graph","display_name":"Graph","score":0.37613001465797424},{"id":"https://openalex.org/keywords/chordal-graph","display_name":"Chordal graph","score":0.20239979028701782},{"id":"https://openalex.org/keywords/1-planar-graph","display_name":"1-planar graph","score":0.07321116328239441},{"id":"https://openalex.org/keywords/mathematical-analysis","display_name":"Mathematical analysis","score":0.06613802909851074}],"concepts":[{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.8677787780761719},{"id":"https://openalex.org/C114614502","wikidata":"https://www.wikidata.org/wiki/Q76592","display_name":"Combinatorics","level":1,"score":0.7175545692443848},{"id":"https://openalex.org/C72134830","wikidata":"https://www.wikidata.org/wiki/Q5166524","display_name":"Convexity","level":2,"score":0.6857357025146484},{"id":"https://openalex.org/C165818556","wikidata":"https://www.wikidata.org/wiki/Q213488","display_name":"Geodesic","level":2,"score":0.5764609575271606},{"id":"https://openalex.org/C198043062","wikidata":"https://www.wikidata.org/wiki/Q180953","display_name":"Metric space","level":2,"score":0.5578488111495972},{"id":"https://openalex.org/C118615104","wikidata":"https://www.wikidata.org/wiki/Q121416","display_name":"Discrete mathematics","level":1,"score":0.5441535115242004},{"id":"https://openalex.org/C8554925","wikidata":"https://www.wikidata.org/wiki/Q3893853","display_name":"Split graph","level":5,"score":0.441322386264801},{"id":"https://openalex.org/C101468663","wikidata":"https://www.wikidata.org/wiki/Q1620158","display_name":"Modular design","level":2,"score":0.410036563873291},{"id":"https://openalex.org/C132525143","wikidata":"https://www.wikidata.org/wiki/Q141488","display_name":"Graph","level":2,"score":0.37613001465797424},{"id":"https://openalex.org/C160446614","wikidata":"https://www.wikidata.org/wiki/Q1322892","display_name":"Chordal graph","level":3,"score":0.20239979028701782},{"id":"https://openalex.org/C102192266","wikidata":"https://www.wikidata.org/wiki/Q4545823","display_name":"1-planar graph","level":4,"score":0.07321116328239441},{"id":"https://openalex.org/C134306372","wikidata":"https://www.wikidata.org/wiki/Q7754","display_name":"Mathematical analysis","level":1,"score":0.06613802909851074},{"id":"https://openalex.org/C111919701","wikidata":"https://www.wikidata.org/wiki/Q9135","display_name":"Operating system","level":1,"score":0.0},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.0},{"id":"https://openalex.org/C162324750","wikidata":"https://www.wikidata.org/wiki/Q8134","display_name":"Economics","level":0,"score":0.0},{"id":"https://openalex.org/C106159729","wikidata":"https://www.wikidata.org/wiki/Q2294553","display_name":"Financial economics","level":1,"score":0.0}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1016/0012-365x(95)00217-k","is_oa":false,"landing_page_url":"https://doi.org/10.1016/0012-365x(95)00217-k","pdf_url":null,"source":{"id":"https://openalex.org/S18902827","display_name":"Discrete Mathematics","issn_l":"0012-365X","issn":["0012-365X","1872-681X"],"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":"Discrete Mathematics","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":27,"referenced_works":["https://openalex.org/W62146694","https://openalex.org/W165014760","https://openalex.org/W577570849","https://openalex.org/W623822468","https://openalex.org/W1550662968","https://openalex.org/W1576113015","https://openalex.org/W1976753172","https://openalex.org/W1979784769","https://openalex.org/W1980124329","https://openalex.org/W1994586124","https://openalex.org/W2003635570","https://openalex.org/W2028400828","https://openalex.org/W2032823228","https://openalex.org/W2041910029","https://openalex.org/W2053552665","https://openalex.org/W2063849229","https://openalex.org/W2081462933","https://openalex.org/W2117475001","https://openalex.org/W2125359873","https://openalex.org/W2489437981","https://openalex.org/W2601425046","https://openalex.org/W2913238120","https://openalex.org/W2977407544","https://openalex.org/W2987990768","https://openalex.org/W6602559759","https://openalex.org/W6634641092","https://openalex.org/W6768385666"],"related_works":["https://openalex.org/W1964872188","https://openalex.org/W2187391117","https://openalex.org/W1981809986","https://openalex.org/W2949367465","https://openalex.org/W4235203617","https://openalex.org/W2006359264","https://openalex.org/W3029201158","https://openalex.org/W2056357792","https://openalex.org/W2051545453","https://openalex.org/W4299607453"],"abstract_inverted_index":null,"counts_by_year":[{"year":2026,"cited_by_count":2},{"year":2025,"cited_by_count":2},{"year":2024,"cited_by_count":5},{"year":2023,"cited_by_count":4},{"year":2022,"cited_by_count":3},{"year":2021,"cited_by_count":1},{"year":2020,"cited_by_count":2},{"year":2019,"cited_by_count":1},{"year":2017,"cited_by_count":2},{"year":2014,"cited_by_count":3},{"year":2013,"cited_by_count":8},{"year":2012,"cited_by_count":1}],"updated_date":"2026-04-22T08:38:42.863108","created_date":"2025-10-10T00:00:00"}