{"id":"https://openalex.org/W1985109353","doi":"https://doi.org/10.1016/0020-0190(84)90055-3","title":"Inverse morphic equivalence on languages","display_name":"Inverse morphic equivalence on languages","publication_year":1984,"publication_date":"1984-11-01","ids":{"openalex":"https://openalex.org/W1985109353","doi":"https://doi.org/10.1016/0020-0190(84)90055-3","mag":"1985109353"},"language":"en","primary_location":{"id":"doi:10.1016/0020-0190(84)90055-3","is_oa":false,"landing_page_url":"https://doi.org/10.1016/0020-0190(84)90055-3","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/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"]}],"countries":["FI"],"is_corresponding":true,"raw_author_name":"Juhani Karhum\u00e4ki","raw_affiliation_strings":["University of Turku,Turku, Finland"],"affiliations":[{"raw_affiliation_string":"University of Turku,Turku, Finland","institution_ids":["https://openalex.org/I155660961"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5110252515","display_name":"Derick Wood","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"]}],"countries":["CA"],"is_corresponding":false,"raw_author_name":"Derick Wood","raw_affiliation_strings":["Univ. of Waterloo,Waterloo,Ont.,Canada"],"affiliations":[{"raw_affiliation_string":"Univ. of Waterloo,Waterloo,Ont.,Canada","institution_ids":["https://openalex.org/I151746483"]}]}],"institutions":[],"countries_distinct_count":2,"institutions_distinct_count":2,"corresponding_author_ids":["https://openalex.org/A5085504322"],"corresponding_institution_ids":["https://openalex.org/I155660961"],"apc_list":{"value":2200,"currency":"USD","value_usd":2200},"apc_paid":null,"fwci":3.2446,"has_fulltext":false,"cited_by_count":8,"citation_normalized_percentile":{"value":0.91767648,"is_in_top_1_percent":false,"is_in_top_10_percent":true},"cited_by_percentile_year":null,"biblio":{"volume":"19","issue":"5","first_page":"213","last_page":"218"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T11567","display_name":"semigroups and automata theory","score":0.9998000264167786,"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":0.9998000264167786,"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/T11727","display_name":"Advanced Algebra and Logic","score":0.9987999796867371,"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/T10181","display_name":"Natural Language Processing Techniques","score":0.9904000163078308,"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/equivalence","display_name":"Equivalence (formal languages)","score":0.6926876306533813},{"id":"https://openalex.org/keywords/inverse","display_name":"Inverse","score":0.6077070236206055},{"id":"https://openalex.org/keywords/mathematics","display_name":"Mathematics","score":0.49971723556518555},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.49742820858955383},{"id":"https://openalex.org/keywords/formal-language","display_name":"Formal language","score":0.4304671883583069},{"id":"https://openalex.org/keywords/discrete-mathematics","display_name":"Discrete mathematics","score":0.3782152831554413},{"id":"https://openalex.org/keywords/theoretical-computer-science","display_name":"Theoretical computer science","score":0.3349974751472473},{"id":"https://openalex.org/keywords/algorithm","display_name":"Algorithm","score":0.3345007002353668}],"concepts":[{"id":"https://openalex.org/C2780069185","wikidata":"https://www.wikidata.org/wiki/Q7977945","display_name":"Equivalence (formal languages)","level":2,"score":0.6926876306533813},{"id":"https://openalex.org/C207467116","wikidata":"https://www.wikidata.org/wiki/Q4385666","display_name":"Inverse","level":2,"score":0.6077070236206055},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.49971723556518555},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.49742820858955383},{"id":"https://openalex.org/C146072743","wikidata":"https://www.wikidata.org/wiki/Q192161","display_name":"Formal language","level":2,"score":0.4304671883583069},{"id":"https://openalex.org/C118615104","wikidata":"https://www.wikidata.org/wiki/Q121416","display_name":"Discrete mathematics","level":1,"score":0.3782152831554413},{"id":"https://openalex.org/C80444323","wikidata":"https://www.wikidata.org/wiki/Q2878974","display_name":"Theoretical computer science","level":1,"score":0.3349974751472473},{"id":"https://openalex.org/C11413529","wikidata":"https://www.wikidata.org/wiki/Q8366","display_name":"Algorithm","level":1,"score":0.3345007002353668},{"id":"https://openalex.org/C2524010","wikidata":"https://www.wikidata.org/wiki/Q8087","display_name":"Geometry","level":1,"score":0.0}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1016/0020-0190(84)90055-3","is_oa":false,"landing_page_url":"https://doi.org/10.1016/0020-0190(84)90055-3","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":[],"awards":[],"funders":[],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":22,"referenced_works":["https://openalex.org/W39461830","https://openalex.org/W172706128","https://openalex.org/W649173217","https://openalex.org/W1528480078","https://openalex.org/W1570877636","https://openalex.org/W1859552527","https://openalex.org/W1969798715","https://openalex.org/W1971435636","https://openalex.org/W1988377318","https://openalex.org/W1991466985","https://openalex.org/W2012813724","https://openalex.org/W2021028197","https://openalex.org/W2026366548","https://openalex.org/W2043837664","https://openalex.org/W2055420198","https://openalex.org/W2061705910","https://openalex.org/W2071271929","https://openalex.org/W2074565802","https://openalex.org/W6601620188","https://openalex.org/W6607081214","https://openalex.org/W6631634121","https://openalex.org/W6664286913"],"related_works":["https://openalex.org/W4317939968","https://openalex.org/W3097860111","https://openalex.org/W3123455607","https://openalex.org/W2138137818","https://openalex.org/W2460944165","https://openalex.org/W2077582506","https://openalex.org/W2375033689","https://openalex.org/W4287830728","https://openalex.org/W3007358821","https://openalex.org/W83562734"],"abstract_inverted_index":null,"counts_by_year":[],"updated_date":"2025-11-06T03:46:38.306776","created_date":"2025-10-10T00:00:00"}