{"id":"https://openalex.org/W2093419825","doi":"https://doi.org/10.1007/bf00288638","title":"Nonterminals versus homomorphisms in defining languages for some classes of rewriting systems","display_name":"Nonterminals versus homomorphisms in defining languages for some classes of rewriting systems","publication_year":1974,"publication_date":"1974-01-01","ids":{"openalex":"https://openalex.org/W2093419825","doi":"https://doi.org/10.1007/bf00288638","mag":"2093419825"},"language":"en","primary_location":{"id":"doi:10.1007/bf00288638","is_oa":false,"landing_page_url":"https://doi.org/10.1007/bf00288638","pdf_url":null,"source":{"id":"https://openalex.org/S84409463","display_name":"Acta Informatica","issn_l":"0001-5903","issn":["0001-5903","1432-0525"],"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":"Acta Informatica","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/A5045244980","display_name":"Andrzej Ehrenfeucht","orcid":null},"institutions":[{"id":"https://openalex.org/I188538660","display_name":"University of Colorado Boulder","ror":"https://ror.org/02ttsq026","country_code":"US","type":"education","lineage":["https://openalex.org/I188538660"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"A. Ehrenfeucht","raw_affiliation_strings":["Department of Computer Science, University of Colorado, 80302, Boulder, Colorado, USA"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Computer Science, University of Colorado, 80302, Boulder, Colorado, USA","institution_ids":["https://openalex.org/I188538660"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5110486000","display_name":"Grzegorz Rozenberg","orcid":null},"institutions":[{"id":"https://openalex.org/I149213910","display_name":"University of Antwerp","ror":"https://ror.org/008x57b05","country_code":"BE","type":"education","lineage":["https://openalex.org/I149213910"]},{"id":"https://openalex.org/I193662353","display_name":"Utrecht University","ror":"https://ror.org/04pp8hn57","country_code":"NL","type":"education","lineage":["https://openalex.org/I193662353"]}],"countries":["BE","NL"],"is_corresponding":false,"raw_author_name":"G. Rozenberg","raw_affiliation_strings":["Department of Mathematics, Antwerp University, UIA, Wilrijk, Belgium","Institute of Mathematics University of Utrecht, Utrecht-Uithof, The Netherlands"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Mathematics, Antwerp University, UIA, Wilrijk, Belgium","institution_ids":["https://openalex.org/I149213910"]},{"raw_affiliation_string":"Institute of Mathematics University of Utrecht, Utrecht-Uithof, The Netherlands","institution_ids":["https://openalex.org/I193662353"]}]}],"institutions":[],"countries_distinct_count":3,"institutions_distinct_count":3,"corresponding_author_ids":[],"corresponding_institution_ids":[],"apc_list":{"value":2990,"currency":"USD","value_usd":2990},"apc_paid":null,"fwci":21.4019,"has_fulltext":false,"cited_by_count":23,"citation_normalized_percentile":{"value":0.99224516,"is_in_top_1_percent":true,"is_in_top_10_percent":true},"cited_by_percentile_year":null,"biblio":{"volume":"3","issue":"3","first_page":"265","last_page":"283"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T11975","display_name":"Evolutionary Algorithms and Applications","score":0.9819999933242798,"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"}},"topics":[{"id":"https://openalex.org/T11975","display_name":"Evolutionary Algorithms and Applications","score":0.9819999933242798,"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/T12029","display_name":"DNA and Biological Computing","score":0.9785000085830688,"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/T11567","display_name":"semigroups and automata theory","score":0.9782000184059143,"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/rewriting","display_name":"Rewriting","score":0.906836986541748},{"id":"https://openalex.org/keywords/confluence","display_name":"Confluence","score":0.7256311178207397},{"id":"https://openalex.org/keywords/chomsky-hierarchy","display_name":"Chomsky hierarchy","score":0.593302309513092},{"id":"https://openalex.org/keywords/theory-of-computation","display_name":"Theory of computation","score":0.5670818090438843},{"id":"https://openalex.org/keywords/hierarchy","display_name":"Hierarchy","score":0.559848964214325},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.5235228538513184},{"id":"https://openalex.org/keywords/axiom","display_name":"Axiom","score":0.5047932863235474},{"id":"https://openalex.org/keywords/homomorphism","display_name":"Homomorphism","score":0.49913930892944336},{"id":"https://openalex.org/keywords/graph-rewriting","display_name":"Graph rewriting","score":0.47573184967041016},{"id":"https://openalex.org/keywords/mathematics","display_name":"Mathematics","score":0.4562644958496094},{"id":"https://openalex.org/keywords/set","display_name":"Set (abstract data type)","score":0.4446679353713989},{"id":"https://openalex.org/keywords/formal-language","display_name":"Formal language","score":0.43665558099746704},{"id":"https://openalex.org/keywords/programming-language","display_name":"Programming language","score":0.4070129692554474},{"id":"https://openalex.org/keywords/theoretical-computer-science","display_name":"Theoretical computer science","score":0.2527206838130951},{"id":"https://openalex.org/keywords/discrete-mathematics","display_name":"Discrete mathematics","score":0.24875172972679138},{"id":"https://openalex.org/keywords/graph","display_name":"Graph","score":0.15170523524284363}],"concepts":[{"id":"https://openalex.org/C154690210","wikidata":"https://www.wikidata.org/wiki/Q1668499","display_name":"Rewriting","level":2,"score":0.906836986541748},{"id":"https://openalex.org/C77906462","wikidata":"https://www.wikidata.org/wiki/Q1140902","display_name":"Confluence","level":2,"score":0.7256311178207397},{"id":"https://openalex.org/C92273848","wikidata":"https://www.wikidata.org/wiki/Q190913","display_name":"Chomsky hierarchy","level":3,"score":0.593302309513092},{"id":"https://openalex.org/C24858836","wikidata":"https://www.wikidata.org/wiki/Q844718","display_name":"Theory of computation","level":2,"score":0.5670818090438843},{"id":"https://openalex.org/C31170391","wikidata":"https://www.wikidata.org/wiki/Q188619","display_name":"Hierarchy","level":2,"score":0.559848964214325},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.5235228538513184},{"id":"https://openalex.org/C167729594","wikidata":"https://www.wikidata.org/wiki/Q17736","display_name":"Axiom","level":2,"score":0.5047932863235474},{"id":"https://openalex.org/C4042151","wikidata":"https://www.wikidata.org/wiki/Q215111","display_name":"Homomorphism","level":2,"score":0.49913930892944336},{"id":"https://openalex.org/C558772884","wikidata":"https://www.wikidata.org/wiki/Q1508564","display_name":"Graph rewriting","level":3,"score":0.47573184967041016},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.4562644958496094},{"id":"https://openalex.org/C177264268","wikidata":"https://www.wikidata.org/wiki/Q1514741","display_name":"Set (abstract data type)","level":2,"score":0.4446679353713989},{"id":"https://openalex.org/C146072743","wikidata":"https://www.wikidata.org/wiki/Q192161","display_name":"Formal language","level":2,"score":0.43665558099746704},{"id":"https://openalex.org/C199360897","wikidata":"https://www.wikidata.org/wiki/Q9143","display_name":"Programming language","level":1,"score":0.4070129692554474},{"id":"https://openalex.org/C80444323","wikidata":"https://www.wikidata.org/wiki/Q2878974","display_name":"Theoretical computer science","level":1,"score":0.2527206838130951},{"id":"https://openalex.org/C118615104","wikidata":"https://www.wikidata.org/wiki/Q121416","display_name":"Discrete mathematics","level":1,"score":0.24875172972679138},{"id":"https://openalex.org/C132525143","wikidata":"https://www.wikidata.org/wiki/Q141488","display_name":"Graph","level":2,"score":0.15170523524284363},{"id":"https://openalex.org/C34447519","wikidata":"https://www.wikidata.org/wiki/Q179522","display_name":"Market economy","level":1,"score":0.0},{"id":"https://openalex.org/C2524010","wikidata":"https://www.wikidata.org/wiki/Q8087","display_name":"Geometry","level":1,"score":0.0},{"id":"https://openalex.org/C162324750","wikidata":"https://www.wikidata.org/wiki/Q8134","display_name":"Economics","level":0,"score":0.0}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1007/bf00288638","is_oa":false,"landing_page_url":"https://doi.org/10.1007/bf00288638","pdf_url":null,"source":{"id":"https://openalex.org/S84409463","display_name":"Acta Informatica","issn_l":"0001-5903","issn":["0001-5903","1432-0525"],"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":"Acta Informatica","raw_type":"journal-article"}],"best_oa_location":null,"sustainable_development_goals":[{"id":"https://metadata.un.org/sdg/4","score":0.800000011920929,"display_name":"Quality Education"}],"awards":[],"funders":[],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":22,"referenced_works":["https://openalex.org/W1546437343","https://openalex.org/W1564690864","https://openalex.org/W1817451992","https://openalex.org/W1968427680","https://openalex.org/W1981896174","https://openalex.org/W1994299651","https://openalex.org/W1997470874","https://openalex.org/W2001114061","https://openalex.org/W2005086376","https://openalex.org/W2014861058","https://openalex.org/W2015908876","https://openalex.org/W2016206602","https://openalex.org/W2057132383","https://openalex.org/W2058684880","https://openalex.org/W2083298149","https://openalex.org/W2124479173","https://openalex.org/W2166047119","https://openalex.org/W2321795613","https://openalex.org/W2592184324","https://openalex.org/W2797656628","https://openalex.org/W4213372134","https://openalex.org/W4229781645"],"related_works":["https://openalex.org/W1852104647","https://openalex.org/W1491530003","https://openalex.org/W2277371287","https://openalex.org/W2129638526","https://openalex.org/W2596819160","https://openalex.org/W2131290392","https://openalex.org/W1527504055","https://openalex.org/W111608424","https://openalex.org/W1540094790","https://openalex.org/W1977800108"],"abstract_inverted_index":null,"counts_by_year":[],"updated_date":"2026-07-23T08:03:31.855105","created_date":"2025-10-10T00:00:00"}