{"id":"https://openalex.org/W2045962990","doi":"https://doi.org/10.1016/0020-0190(89)90080-x","title":"Deciding the immutability of regular codes and languages under finite transductions","display_name":"Deciding the immutability of regular codes and languages under finite transductions","publication_year":1989,"publication_date":"1989-06-01","ids":{"openalex":"https://openalex.org/W2045962990","doi":"https://doi.org/10.1016/0020-0190(89)90080-x","mag":"2045962990"},"language":"en","primary_location":{"id":"doi:10.1016/0020-0190(89)90080-x","is_oa":false,"landing_page_url":"https://doi.org/10.1016/0020-0190(89)90080-x","pdf_url":null,"source":{"id":"https://openalex.org/S147953040","display_name":"Information Processing Letters","issn_l":"0020-0190","issn":["0020-0190","1872-6119"],"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":"Information Processing Letters","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/A5038890572","display_name":"Tom Head","orcid":"https://orcid.org/0000-0002-7558-6953"},"institutions":[{"id":"https://openalex.org/I123946342","display_name":"Binghamton University","ror":"https://ror.org/008rmbt77","country_code":"US","type":"education","lineage":["https://openalex.org/I123946342"]}],"countries":["US"],"is_corresponding":true,"raw_author_name":"Tom Head","raw_affiliation_strings":["Department of Mathematical Sciences, State University of New York, Binghamton, NY 13901, USA"],"affiliations":[{"raw_affiliation_string":"Department of Mathematical Sciences, State University of New York, Binghamton, NY 13901, USA","institution_ids":["https://openalex.org/I123946342"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":1,"corresponding_author_ids":["https://openalex.org/A5038890572"],"corresponding_institution_ids":["https://openalex.org/I123946342"],"apc_list":{"value":2200,"currency":"USD","value_usd":2200},"apc_paid":null,"fwci":0.0,"has_fulltext":false,"cited_by_count":3,"citation_normalized_percentile":{"value":0.18860904,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":90,"max":94},"biblio":{"volume":"31","issue":"5","first_page":"239","last_page":"241"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T11567","display_name":"semigroups and automata theory","score":0.9997000098228455,"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":0.9997000098228455,"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/T12029","display_name":"DNA and Biological Computing","score":0.9990000128746033,"subfield":{"id":"https://openalex.org/subfields/1312","display_name":"Molecular Biology"},"field":{"id":"https://openalex.org/fields/13","display_name":"Biochemistry, Genetics and Molecular Biology"},"domain":{"id":"https://openalex.org/domains/1","display_name":"Life Sciences"}},{"id":"https://openalex.org/T11130","display_name":"Coding theory and cryptography","score":0.9980000257492065,"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/immutability","display_name":"Immutability","score":0.9946941137313843},{"id":"https://openalex.org/keywords/relation","display_name":"Relation (database)","score":0.6728591918945312},{"id":"https://openalex.org/keywords/code","display_name":"Code (set theory)","score":0.6195746660232544},{"id":"https://openalex.org/keywords/set","display_name":"Set (abstract data type)","score":0.5920560956001282},{"id":"https://openalex.org/keywords/binary-relation","display_name":"Binary relation","score":0.4994840621948242},{"id":"https://openalex.org/keywords/binary-number","display_name":"Binary number","score":0.4935382604598999},{"id":"https://openalex.org/keywords/mathematics","display_name":"Mathematics","score":0.4708774983882904},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.4287058413028717},{"id":"https://openalex.org/keywords/programming-language","display_name":"Programming language","score":0.274145245552063},{"id":"https://openalex.org/keywords/discrete-mathematics","display_name":"Discrete mathematics","score":0.24262526631355286},{"id":"https://openalex.org/keywords/arithmetic","display_name":"Arithmetic","score":0.19597548246383667}],"concepts":[{"id":"https://openalex.org/C2776126399","wikidata":"https://www.wikidata.org/wiki/Q3942906","display_name":"Immutability","level":3,"score":0.9946941137313843},{"id":"https://openalex.org/C25343380","wikidata":"https://www.wikidata.org/wiki/Q277521","display_name":"Relation (database)","level":2,"score":0.6728591918945312},{"id":"https://openalex.org/C2776760102","wikidata":"https://www.wikidata.org/wiki/Q5139990","display_name":"Code (set theory)","level":3,"score":0.6195746660232544},{"id":"https://openalex.org/C177264268","wikidata":"https://www.wikidata.org/wiki/Q1514741","display_name":"Set (abstract data type)","level":2,"score":0.5920560956001282},{"id":"https://openalex.org/C65180967","wikidata":"https://www.wikidata.org/wiki/Q130901","display_name":"Binary relation","level":2,"score":0.4994840621948242},{"id":"https://openalex.org/C48372109","wikidata":"https://www.wikidata.org/wiki/Q3913","display_name":"Binary number","level":2,"score":0.4935382604598999},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.4708774983882904},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.4287058413028717},{"id":"https://openalex.org/C199360897","wikidata":"https://www.wikidata.org/wiki/Q9143","display_name":"Programming language","level":1,"score":0.274145245552063},{"id":"https://openalex.org/C118615104","wikidata":"https://www.wikidata.org/wiki/Q121416","display_name":"Discrete mathematics","level":1,"score":0.24262526631355286},{"id":"https://openalex.org/C94375191","wikidata":"https://www.wikidata.org/wiki/Q11205","display_name":"Arithmetic","level":1,"score":0.19597548246383667},{"id":"https://openalex.org/C38652104","wikidata":"https://www.wikidata.org/wiki/Q3510521","display_name":"Computer security","level":1,"score":0.0},{"id":"https://openalex.org/C2779687700","wikidata":"https://www.wikidata.org/wiki/Q20514253","display_name":"Blockchain","level":2,"score":0.0},{"id":"https://openalex.org/C77088390","wikidata":"https://www.wikidata.org/wiki/Q8513","display_name":"Database","level":1,"score":0.0}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1016/0020-0190(89)90080-x","is_oa":false,"landing_page_url":"https://doi.org/10.1016/0020-0190(89)90080-x","pdf_url":null,"source":{"id":"https://openalex.org/S147953040","display_name":"Information Processing Letters","issn_l":"0020-0190","issn":["0020-0190","1872-6119"],"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":"Information Processing Letters","raw_type":"journal-article"}],"best_oa_location":null,"sustainable_development_goals":[{"id":"https://metadata.un.org/sdg/16","score":0.75,"display_name":"Peace, Justice and strong institutions"}],"awards":[],"funders":[],"has_content":{"grobid_xml":false,"pdf":false},"content_urls":null,"referenced_works_count":10,"referenced_works":["https://openalex.org/W196919032","https://openalex.org/W1505482284","https://openalex.org/W1970221790","https://openalex.org/W1987232115","https://openalex.org/W2004367544","https://openalex.org/W2011523226","https://openalex.org/W2029245563","https://openalex.org/W2061054158","https://openalex.org/W2062101136","https://openalex.org/W6657682749"],"related_works":["https://openalex.org/W1517747134","https://openalex.org/W2802479602","https://openalex.org/W4230073810","https://openalex.org/W1995127370","https://openalex.org/W3048243594","https://openalex.org/W2037735945","https://openalex.org/W2379390860","https://openalex.org/W1964149748","https://openalex.org/W1835470262","https://openalex.org/W2184674784"],"abstract_inverted_index":null,"counts_by_year":[{"year":2015,"cited_by_count":1}],"updated_date":"2025-11-06T03:46:38.306776","created_date":"2025-10-10T00:00:00"}