{"id":"https://openalex.org/W2049485421","doi":"https://doi.org/10.1016/s0304-3975(01)00389-9","title":"Conway's problem for three-word sets","display_name":"Conway's problem for three-word sets","publication_year":2002,"publication_date":"2002-10-01","ids":{"openalex":"https://openalex.org/W2049485421","doi":"https://doi.org/10.1016/s0304-3975(01)00389-9","mag":"2049485421"},"language":"en","primary_location":{"id":"doi:10.1016/s0304-3975(01)00389-9","is_oa":false,"landing_page_url":"https://doi.org/10.1016/s0304-3975(01)00389-9","pdf_url":null,"source":{"id":"https://openalex.org/S90727058","display_name":"Theoretical Computer Science","issn_l":"0304-3975","issn":["0304-3975","1879-2294"],"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":"Theoretical Computer Science","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/A5085504322","display_name":"Juhani Karhum\u00e4ki","orcid":null},"institutions":[{"id":"https://openalex.org/I155660961","display_name":"University of Turku","ror":"https://ror.org/05vghhr25","country_code":"FI","type":"education","lineage":["https://openalex.org/I155660961"]},{"id":"https://openalex.org/I183173800","display_name":"Turku Centre for Computer Science","ror":"https://ror.org/00vy7ed73","country_code":"FI","type":"facility","lineage":["https://openalex.org/I130217899","https://openalex.org/I155660961","https://openalex.org/I183173800"]}],"countries":["FI"],"is_corresponding":false,"raw_author_name":"Juhani Karhum\u00e4ki","raw_affiliation_strings":["Department of Mathematics, University of Turku and Turku Centre for Computer Science (TUCS) Turku 20014, Finland"],"affiliations":[{"raw_affiliation_string":"Department of Mathematics, University of Turku and Turku Centre for Computer Science (TUCS) Turku 20014, Finland","institution_ids":["https://openalex.org/I183173800","https://openalex.org/I155660961"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5047091186","display_name":"Ion Petre","orcid":"https://orcid.org/0000-0002-5014-5529"},"institutions":[{"id":"https://openalex.org/I155660961","display_name":"University of Turku","ror":"https://ror.org/05vghhr25","country_code":"FI","type":"education","lineage":["https://openalex.org/I155660961"]},{"id":"https://openalex.org/I183173800","display_name":"Turku Centre for Computer Science","ror":"https://ror.org/00vy7ed73","country_code":"FI","type":"facility","lineage":["https://openalex.org/I130217899","https://openalex.org/I155660961","https://openalex.org/I183173800"]}],"countries":["FI"],"is_corresponding":true,"raw_author_name":"Ion Petre","raw_affiliation_strings":["Department of Mathematics, University of Turku and Turku Centre for Computer Science (TUCS) Turku 20014, Finland"],"affiliations":[{"raw_affiliation_string":"Department of Mathematics, University of Turku and Turku Centre for Computer Science (TUCS) Turku 20014, Finland","institution_ids":["https://openalex.org/I183173800","https://openalex.org/I155660961"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":2,"corresponding_author_ids":["https://openalex.org/A5047091186"],"corresponding_institution_ids":["https://openalex.org/I155660961","https://openalex.org/I183173800"],"apc_list":{"value":2690,"currency":"USD","value_usd":2690},"apc_paid":null,"fwci":5.5819,"has_fulltext":false,"cited_by_count":24,"citation_normalized_percentile":{"value":0.96655439,"is_in_top_1_percent":false,"is_in_top_10_percent":true},"cited_by_percentile_year":{"min":89,"max":94},"biblio":{"volume":"289","issue":"1","first_page":"705","last_page":"725"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T11567","display_name":"semigroups and automata theory","score":0.9998999834060669,"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/T11567","display_name":"semigroups and automata theory","score":0.9998999834060669,"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/T11269","display_name":"Algorithms and Data Compression","score":0.9939000010490417,"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/T10181","display_name":"Natural Language Processing Techniques","score":0.9879999756813049,"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/centralizer-and-normalizer","display_name":"Centralizer and normalizer","score":0.7845144867897034},{"id":"https://openalex.org/keywords/element","display_name":"Element (criminal law)","score":0.769214391708374},{"id":"https://openalex.org/keywords/mathematics","display_name":"Mathematics","score":0.6296976208686829},{"id":"https://openalex.org/keywords/word","display_name":"Word (group theory)","score":0.5976783037185669},{"id":"https://openalex.org/keywords/characterization","display_name":"Characterization (materials science)","score":0.4771958291530609},{"id":"https://openalex.org/keywords/algebra-over-a-field","display_name":"Algebra over a field","score":0.45131635665893555},{"id":"https://openalex.org/keywords/code","display_name":"Code (set theory)","score":0.43728089332580566},{"id":"https://openalex.org/keywords/algebraic-number","display_name":"Algebraic number","score":0.41315826773643494},{"id":"https://openalex.org/keywords/discrete-mathematics","display_name":"Discrete mathematics","score":0.36207595467567444},{"id":"https://openalex.org/keywords/combinatorics","display_name":"Combinatorics","score":0.3364734947681427},{"id":"https://openalex.org/keywords/pure-mathematics","display_name":"Pure mathematics","score":0.2650262415409088},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.21889692544937134},{"id":"https://openalex.org/keywords/set","display_name":"Set (abstract data type)","score":0.16908136010169983},{"id":"https://openalex.org/keywords/programming-language","display_name":"Programming language","score":0.12165442109107971},{"id":"https://openalex.org/keywords/law","display_name":"Law","score":0.09065186977386475}],"concepts":[{"id":"https://openalex.org/C75174853","wikidata":"https://www.wikidata.org/wiki/Q190629","display_name":"Centralizer and normalizer","level":2,"score":0.7845144867897034},{"id":"https://openalex.org/C200288055","wikidata":"https://www.wikidata.org/wiki/Q2621792","display_name":"Element (criminal law)","level":2,"score":0.769214391708374},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.6296976208686829},{"id":"https://openalex.org/C90805587","wikidata":"https://www.wikidata.org/wiki/Q10944557","display_name":"Word (group theory)","level":2,"score":0.5976783037185669},{"id":"https://openalex.org/C2780841128","wikidata":"https://www.wikidata.org/wiki/Q5073781","display_name":"Characterization (materials science)","level":2,"score":0.4771958291530609},{"id":"https://openalex.org/C136119220","wikidata":"https://www.wikidata.org/wiki/Q1000660","display_name":"Algebra over a field","level":2,"score":0.45131635665893555},{"id":"https://openalex.org/C2776760102","wikidata":"https://www.wikidata.org/wiki/Q5139990","display_name":"Code (set theory)","level":3,"score":0.43728089332580566},{"id":"https://openalex.org/C9376300","wikidata":"https://www.wikidata.org/wiki/Q168817","display_name":"Algebraic number","level":2,"score":0.41315826773643494},{"id":"https://openalex.org/C118615104","wikidata":"https://www.wikidata.org/wiki/Q121416","display_name":"Discrete mathematics","level":1,"score":0.36207595467567444},{"id":"https://openalex.org/C114614502","wikidata":"https://www.wikidata.org/wiki/Q76592","display_name":"Combinatorics","level":1,"score":0.3364734947681427},{"id":"https://openalex.org/C202444582","wikidata":"https://www.wikidata.org/wiki/Q837863","display_name":"Pure mathematics","level":1,"score":0.2650262415409088},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.21889692544937134},{"id":"https://openalex.org/C177264268","wikidata":"https://www.wikidata.org/wiki/Q1514741","display_name":"Set (abstract data type)","level":2,"score":0.16908136010169983},{"id":"https://openalex.org/C199360897","wikidata":"https://www.wikidata.org/wiki/Q9143","display_name":"Programming language","level":1,"score":0.12165442109107971},{"id":"https://openalex.org/C199539241","wikidata":"https://www.wikidata.org/wiki/Q7748","display_name":"Law","level":1,"score":0.09065186977386475},{"id":"https://openalex.org/C2524010","wikidata":"https://www.wikidata.org/wiki/Q8087","display_name":"Geometry","level":1,"score":0.0},{"id":"https://openalex.org/C171250308","wikidata":"https://www.wikidata.org/wiki/Q11468","display_name":"Nanotechnology","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},{"id":"https://openalex.org/C17744445","wikidata":"https://www.wikidata.org/wiki/Q36442","display_name":"Political science","level":0,"score":0.0},{"id":"https://openalex.org/C134306372","wikidata":"https://www.wikidata.org/wiki/Q7754","display_name":"Mathematical analysis","level":1,"score":0.0}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1016/s0304-3975(01)00389-9","is_oa":false,"landing_page_url":"https://doi.org/10.1016/s0304-3975(01)00389-9","pdf_url":null,"source":{"id":"https://openalex.org/S90727058","display_name":"Theoretical Computer Science","issn_l":"0304-3975","issn":["0304-3975","1879-2294"],"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":"Theoretical Computer Science","raw_type":"journal-article"}],"best_oa_location":null,"sustainable_development_goals":[{"display_name":"Quality Education","score":0.7300000190734863,"id":"https://metadata.un.org/sdg/4"}],"awards":[],"funders":[],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":13,"referenced_works":["https://openalex.org/W106053274","https://openalex.org/W110249491","https://openalex.org/W1502723552","https://openalex.org/W1514324498","https://openalex.org/W1537395609","https://openalex.org/W1539226081","https://openalex.org/W1570949334","https://openalex.org/W1586417893","https://openalex.org/W2026857107","https://openalex.org/W2034921735","https://openalex.org/W2077113220","https://openalex.org/W2167954650","https://openalex.org/W6605623842"],"related_works":["https://openalex.org/W2348675898","https://openalex.org/W2977487684","https://openalex.org/W2017756151","https://openalex.org/W2014142863","https://openalex.org/W3033409000","https://openalex.org/W2266100423","https://openalex.org/W2561344538","https://openalex.org/W2790389999","https://openalex.org/W4313836905","https://openalex.org/W4301180305"],"abstract_inverted_index":null,"counts_by_year":[{"year":2023,"cited_by_count":1},{"year":2017,"cited_by_count":1},{"year":2014,"cited_by_count":1}],"updated_date":"2026-03-10T14:07:55.174380","created_date":"2025-10-10T00:00:00"}
