{"id":"https://openalex.org/W2049564936","doi":"https://doi.org/10.1007/s004930070038","title":"NOTE Spectral Characterization of Tree-Width-Two Graphs","display_name":"NOTE Spectral Characterization of Tree-Width-Two Graphs","publication_year":2000,"publication_date":"2000-01-01","ids":{"openalex":"https://openalex.org/W2049564936","doi":"https://doi.org/10.1007/s004930070038","mag":"2049564936"},"language":"en","primary_location":{"id":"doi:10.1007/s004930070038","is_oa":false,"landing_page_url":"https://doi.org/10.1007/s004930070038","pdf_url":null,"source":{"id":"https://openalex.org/S72366220","display_name":"COMBINATORICA","issn_l":"0209-9683","issn":["0209-9683","1439-6912"],"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":"Combinatorica","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/A5029858957","display_name":"Andre\u0131\u030c Kotlov","orcid":null},"institutions":[{"id":"https://openalex.org/I151746483","display_name":"University of Waterloo","ror":"https://ror.org/01aff2v68","country_code":"CA","type":"education","lineage":["https://openalex.org/I151746483"]},{"id":"https://openalex.org/I1341640284","display_name":"Centrum Wiskunde & Informatica","ror":"https://ror.org/00x7ekv49","country_code":"NL","type":"facility","lineage":["https://openalex.org/I1341640284","https://openalex.org/I2800991832"]}],"countries":["CA","NL"],"is_corresponding":true,"raw_author_name":"Andrei Kotlov","raw_affiliation_strings":["Dept. of Combinatorics and Optimization, University of Waterloo; Waterloo, Ontario, Canada, N2L 3G1  and  CWI, Kruislaan 413, 1098 SJ Amsterdam, The Netherlands;","Dept. of Combinatorics and Optimization, University of Waterloo","Waterloo, Ontario, Canada, N2L 3G1  and  CWI, Kruislaan 413, 1098 SJ Amsterdam, The Netherlands"],"affiliations":[{"raw_affiliation_string":"Dept. of Combinatorics and Optimization, University of Waterloo; Waterloo, Ontario, Canada, N2L 3G1  and  CWI, Kruislaan 413, 1098 SJ Amsterdam, The Netherlands;","institution_ids":["https://openalex.org/I151746483"]},{"raw_affiliation_string":"Dept. of Combinatorics and Optimization, University of Waterloo","institution_ids":["https://openalex.org/I151746483"]},{"raw_affiliation_string":"Waterloo, Ontario, Canada, N2L 3G1  and  CWI, Kruislaan 413, 1098 SJ Amsterdam, The Netherlands","institution_ids":["https://openalex.org/I1341640284"]}]}],"institutions":[],"countries_distinct_count":2,"institutions_distinct_count":1,"corresponding_author_ids":["https://openalex.org/A5029858957"],"corresponding_institution_ids":["https://openalex.org/I1341640284","https://openalex.org/I151746483"],"apc_list":null,"apc_paid":null,"fwci":1.035,"has_fulltext":false,"cited_by_count":11,"citation_normalized_percentile":{"value":0.73559699,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":89,"max":98},"biblio":{"volume":"20","issue":"1","first_page":"147","last_page":"152"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T11476","display_name":"Graph theory and applications","score":0.9958999752998352,"subfield":{"id":"https://openalex.org/subfields/2608","display_name":"Geometry and Topology"},"field":{"id":"https://openalex.org/fields/26","display_name":"Mathematics"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},"topics":[{"id":"https://openalex.org/T11476","display_name":"Graph theory and applications","score":0.9958999752998352,"subfield":{"id":"https://openalex.org/subfields/2608","display_name":"Geometry and Topology"},"field":{"id":"https://openalex.org/fields/26","display_name":"Mathematics"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10374","display_name":"Advanced Graph Theory Research","score":0.9955000281333923,"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/T11797","display_name":"graph theory and CDMA systems","score":0.9948999881744385,"subfield":{"id":"https://openalex.org/subfields/2208","display_name":"Electrical and Electronic Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/mathematics","display_name":"Mathematics","score":0.8781350255012512},{"id":"https://openalex.org/keywords/combinatorics","display_name":"Combinatorics","score":0.8081473708152771},{"id":"https://openalex.org/keywords/monotone-polygon","display_name":"Monotone polygon","score":0.7927840352058411},{"id":"https://openalex.org/keywords/minor","display_name":"Minor (academic)","score":0.7639033198356628},{"id":"https://openalex.org/keywords/graph","display_name":"Graph","score":0.5356255173683167},{"id":"https://openalex.org/keywords/characterization","display_name":"Characterization (materials science)","score":0.5258874297142029},{"id":"https://openalex.org/keywords/invariant","display_name":"Invariant (physics)","score":0.47067078948020935},{"id":"https://openalex.org/keywords/treewidth","display_name":"Treewidth","score":0.4475649893283844},{"id":"https://openalex.org/keywords/tree","display_name":"Tree (set theory)","score":0.43002837896347046},{"id":"https://openalex.org/keywords/discrete-mathematics","display_name":"Discrete mathematics","score":0.41222789883613586},{"id":"https://openalex.org/keywords/pathwidth","display_name":"Pathwidth","score":0.19605693221092224},{"id":"https://openalex.org/keywords/line-graph","display_name":"Line graph","score":0.12789982557296753},{"id":"https://openalex.org/keywords/geometry","display_name":"Geometry","score":0.07866451144218445},{"id":"https://openalex.org/keywords/humanities","display_name":"Humanities","score":0.04108846187591553}],"concepts":[{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.8781350255012512},{"id":"https://openalex.org/C114614502","wikidata":"https://www.wikidata.org/wiki/Q76592","display_name":"Combinatorics","level":1,"score":0.8081473708152771},{"id":"https://openalex.org/C2834757","wikidata":"https://www.wikidata.org/wiki/Q4925424","display_name":"Monotone polygon","level":2,"score":0.7927840352058411},{"id":"https://openalex.org/C2779760435","wikidata":"https://www.wikidata.org/wiki/Q5396169","display_name":"Minor (academic)","level":2,"score":0.7639033198356628},{"id":"https://openalex.org/C132525143","wikidata":"https://www.wikidata.org/wiki/Q141488","display_name":"Graph","level":2,"score":0.5356255173683167},{"id":"https://openalex.org/C2780841128","wikidata":"https://www.wikidata.org/wiki/Q5073781","display_name":"Characterization (materials science)","level":2,"score":0.5258874297142029},{"id":"https://openalex.org/C190470478","wikidata":"https://www.wikidata.org/wiki/Q2370229","display_name":"Invariant (physics)","level":2,"score":0.47067078948020935},{"id":"https://openalex.org/C132569581","wikidata":"https://www.wikidata.org/wiki/Q5067368","display_name":"Treewidth","level":5,"score":0.4475649893283844},{"id":"https://openalex.org/C113174947","wikidata":"https://www.wikidata.org/wiki/Q2859736","display_name":"Tree (set theory)","level":2,"score":0.43002837896347046},{"id":"https://openalex.org/C118615104","wikidata":"https://www.wikidata.org/wiki/Q121416","display_name":"Discrete mathematics","level":1,"score":0.41222789883613586},{"id":"https://openalex.org/C43517604","wikidata":"https://www.wikidata.org/wiki/Q7144893","display_name":"Pathwidth","level":4,"score":0.19605693221092224},{"id":"https://openalex.org/C203776342","wikidata":"https://www.wikidata.org/wiki/Q1378376","display_name":"Line graph","level":3,"score":0.12789982557296753},{"id":"https://openalex.org/C2524010","wikidata":"https://www.wikidata.org/wiki/Q8087","display_name":"Geometry","level":1,"score":0.07866451144218445},{"id":"https://openalex.org/C15708023","wikidata":"https://www.wikidata.org/wiki/Q80083","display_name":"Humanities","level":1,"score":0.04108846187591553},{"id":"https://openalex.org/C171250308","wikidata":"https://www.wikidata.org/wiki/Q11468","display_name":"Nanotechnology","level":1,"score":0.0},{"id":"https://openalex.org/C138885662","wikidata":"https://www.wikidata.org/wiki/Q5891","display_name":"Philosophy","level":0,"score":0.0},{"id":"https://openalex.org/C37914503","wikidata":"https://www.wikidata.org/wiki/Q156495","display_name":"Mathematical physics","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":1,"locations":[{"id":"doi:10.1007/s004930070038","is_oa":false,"landing_page_url":"https://doi.org/10.1007/s004930070038","pdf_url":null,"source":{"id":"https://openalex.org/S72366220","display_name":"COMBINATORICA","issn_l":"0209-9683","issn":["0209-9683","1439-6912"],"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":"Combinatorica","raw_type":"journal-article"}],"best_oa_location":null,"sustainable_development_goals":[],"awards":[],"funders":[],"has_content":{"grobid_xml":false,"pdf":false},"content_urls":null,"referenced_works_count":0,"referenced_works":[],"related_works":["https://openalex.org/W2368619281","https://openalex.org/W2377143628","https://openalex.org/W2355995962","https://openalex.org/W2392462513","https://openalex.org/W2362718971","https://openalex.org/W2368173763","https://openalex.org/W2977970519","https://openalex.org/W191560551","https://openalex.org/W2075931614","https://openalex.org/W2391618338"],"abstract_inverted_index":null,"counts_by_year":[{"year":2015,"cited_by_count":1},{"year":2014,"cited_by_count":2},{"year":2013,"cited_by_count":1},{"year":2012,"cited_by_count":4}],"updated_date":"2025-11-06T03:46:38.306776","created_date":"2025-10-10T00:00:00"}
