{"id":"https://openalex.org/W5846485","doi":"https://doi.org/10.1007/bf02280886","title":"On strongly equivalent context-free grammar forms","display_name":"On strongly equivalent context-free grammar forms","publication_year":1976,"publication_date":"1976-09-01","ids":{"openalex":"https://openalex.org/W5846485","doi":"https://doi.org/10.1007/bf02280886","mag":"5846485"},"language":"en","primary_location":{"id":"doi:10.1007/bf02280886","is_oa":false,"landing_page_url":"https://doi.org/10.1007/bf02280886","pdf_url":null,"source":{"id":"https://openalex.org/S35593046","display_name":"Computing","issn_l":"0010-485X","issn":["0010-485X","1436-5057"],"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":"Computing","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/A5110418267","display_name":"S. Ginsburg","orcid":null},"institutions":[{"id":"https://openalex.org/I1174212","display_name":"University of Southern California","ror":"https://ror.org/03taz7m60","country_code":"US","type":"education","lineage":["https://openalex.org/I1174212"]}],"countries":["US"],"is_corresponding":true,"raw_author_name":"S. Ginsburg","raw_affiliation_strings":["University of Southern California, 90007, Los Angeles, CA, USA","University of Southern California, Los Angeles, USA"],"affiliations":[{"raw_affiliation_string":"University of Southern California, 90007, Los Angeles, CA, USA","institution_ids":["https://openalex.org/I1174212"]},{"raw_affiliation_string":"University of Southern California, Los Angeles, USA","institution_ids":["https://openalex.org/I1174212"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5026864542","display_name":"Hermann Maurer","orcid":null},"institutions":[{"id":"https://openalex.org/I102335020","display_name":"Karlsruhe Institute of Technology","ror":"https://ror.org/04t3en479","country_code":"DE","type":"education","lineage":["https://openalex.org/I102335020","https://openalex.org/I1305996414"]}],"countries":["DE"],"is_corresponding":false,"raw_author_name":"H. A. Maurer","raw_affiliation_strings":["Institut f\u00fcr Angewandte Informatik und formale Beschreibungsverfahren, Universit\u00e4t Karlsruhe, D-7500, Karlsruhe, Federal Republic of Germany","Institut f\u00fcr Angewandte Informatik und formale Beschreibungsverfahren, Universit\u00e4t Karlsruhe, Karlsruhe, Federal Republic of Germany"],"affiliations":[{"raw_affiliation_string":"Institut f\u00fcr Angewandte Informatik und formale Beschreibungsverfahren, Universit\u00e4t Karlsruhe, D-7500, Karlsruhe, Federal Republic of Germany","institution_ids":["https://openalex.org/I102335020"]},{"raw_affiliation_string":"Institut f\u00fcr Angewandte Informatik und formale Beschreibungsverfahren, Universit\u00e4t Karlsruhe, Karlsruhe, Federal Republic of Germany","institution_ids":["https://openalex.org/I102335020"]}]}],"institutions":[],"countries_distinct_count":2,"institutions_distinct_count":2,"corresponding_author_ids":["https://openalex.org/A5110418267"],"corresponding_institution_ids":["https://openalex.org/I1174212"],"apc_list":{"value":2290,"currency":"EUR","value_usd":2890},"apc_paid":null,"fwci":3.528,"has_fulltext":false,"cited_by_count":8,"citation_normalized_percentile":{"value":0.92298689,"is_in_top_1_percent":false,"is_in_top_10_percent":true},"cited_by_percentile_year":null,"biblio":{"volume":"16","issue":"3","first_page":"281","last_page":"290"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T11567","display_name":"semigroups and automata theory","score":0.9986000061035156,"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":0.9986000061035156,"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":0.9897000193595886,"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/T11727","display_name":"Advanced Algebra and Logic","score":0.988099992275238,"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/link-grammar","display_name":"Link grammar","score":0.6800763607025146},{"id":"https://openalex.org/keywords/mathematics","display_name":"Mathematics","score":0.6509677171707153},{"id":"https://openalex.org/keywords/modulo","display_name":"Modulo","score":0.6195029616355896},{"id":"https://openalex.org/keywords/distributive-property","display_name":"Distributive property","score":0.6025161743164062},{"id":"https://openalex.org/keywords/grammar","display_name":"Grammar","score":0.5981146097183228},{"id":"https://openalex.org/keywords/mildly-context-sensitive-grammar-formalism","display_name":"Mildly context-sensitive grammar formalism","score":0.5624945163726807},{"id":"https://openalex.org/keywords/isomorphism","display_name":"Isomorphism (crystallography)","score":0.5145358443260193},{"id":"https://openalex.org/keywords/equivalence","display_name":"Equivalence (formal languages)","score":0.5138890743255615},{"id":"https://openalex.org/keywords/equivalence-relation","display_name":"Equivalence relation","score":0.47083190083503723},{"id":"https://openalex.org/keywords/logical-equivalence","display_name":"Logical equivalence","score":0.4507767856121063},{"id":"https://openalex.org/keywords/context","display_name":"Context (archaeology)","score":0.4436004161834717},{"id":"https://openalex.org/keywords/combinatorics","display_name":"Combinatorics","score":0.4154430031776428},{"id":"https://openalex.org/keywords/discrete-mathematics","display_name":"Discrete mathematics","score":0.36132118105888367},{"id":"https://openalex.org/keywords/linguistics","display_name":"Linguistics","score":0.35468167066574097},{"id":"https://openalex.org/keywords/head-driven-phrase-structure-grammar","display_name":"Head-driven phrase structure grammar","score":0.325250506401062},{"id":"https://openalex.org/keywords/arithmetic","display_name":"Arithmetic","score":0.32021215558052063},{"id":"https://openalex.org/keywords/pure-mathematics","display_name":"Pure mathematics","score":0.30045926570892334},{"id":"https://openalex.org/keywords/phrase-structure-rules","display_name":"Phrase structure rules","score":0.28110024333000183},{"id":"https://openalex.org/keywords/philosophy","display_name":"Philosophy","score":0.09763354063034058}],"concepts":[{"id":"https://openalex.org/C957247","wikidata":"https://www.wikidata.org/wiki/Q6554304","display_name":"Link grammar","level":4,"score":0.6800763607025146},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.6509677171707153},{"id":"https://openalex.org/C54732982","wikidata":"https://www.wikidata.org/wiki/Q1415345","display_name":"Modulo","level":2,"score":0.6195029616355896},{"id":"https://openalex.org/C11821877","wikidata":"https://www.wikidata.org/wiki/Q187959","display_name":"Distributive property","level":2,"score":0.6025161743164062},{"id":"https://openalex.org/C26022165","wikidata":"https://www.wikidata.org/wiki/Q8091","display_name":"Grammar","level":2,"score":0.5981146097183228},{"id":"https://openalex.org/C172265290","wikidata":"https://www.wikidata.org/wiki/Q6134957","display_name":"Mildly context-sensitive grammar formalism","level":4,"score":0.5624945163726807},{"id":"https://openalex.org/C203436722","wikidata":"https://www.wikidata.org/wiki/Q902950","display_name":"Isomorphism (crystallography)","level":3,"score":0.5145358443260193},{"id":"https://openalex.org/C2780069185","wikidata":"https://www.wikidata.org/wiki/Q7977945","display_name":"Equivalence (formal languages)","level":2,"score":0.5138890743255615},{"id":"https://openalex.org/C156103551","wikidata":"https://www.wikidata.org/wiki/Q130998","display_name":"Equivalence relation","level":2,"score":0.47083190083503723},{"id":"https://openalex.org/C70846408","wikidata":"https://www.wikidata.org/wiki/Q220433","display_name":"Logical equivalence","level":3,"score":0.4507767856121063},{"id":"https://openalex.org/C2779343474","wikidata":"https://www.wikidata.org/wiki/Q3109175","display_name":"Context (archaeology)","level":2,"score":0.4436004161834717},{"id":"https://openalex.org/C114614502","wikidata":"https://www.wikidata.org/wiki/Q76592","display_name":"Combinatorics","level":1,"score":0.4154430031776428},{"id":"https://openalex.org/C118615104","wikidata":"https://www.wikidata.org/wiki/Q121416","display_name":"Discrete mathematics","level":1,"score":0.36132118105888367},{"id":"https://openalex.org/C41895202","wikidata":"https://www.wikidata.org/wiki/Q8162","display_name":"Linguistics","level":1,"score":0.35468167066574097},{"id":"https://openalex.org/C152862876","wikidata":"https://www.wikidata.org/wiki/Q379294","display_name":"Head-driven phrase structure grammar","level":3,"score":0.325250506401062},{"id":"https://openalex.org/C94375191","wikidata":"https://www.wikidata.org/wiki/Q11205","display_name":"Arithmetic","level":1,"score":0.32021215558052063},{"id":"https://openalex.org/C202444582","wikidata":"https://www.wikidata.org/wiki/Q837863","display_name":"Pure mathematics","level":1,"score":0.30045926570892334},{"id":"https://openalex.org/C80877019","wikidata":"https://www.wikidata.org/wiki/Q7188074","display_name":"Phrase structure rules","level":3,"score":0.28110024333000183},{"id":"https://openalex.org/C138885662","wikidata":"https://www.wikidata.org/wiki/Q5891","display_name":"Philosophy","level":0,"score":0.09763354063034058},{"id":"https://openalex.org/C8010536","wikidata":"https://www.wikidata.org/wiki/Q160398","display_name":"Crystallography","level":1,"score":0.0},{"id":"https://openalex.org/C151730666","wikidata":"https://www.wikidata.org/wiki/Q7205","display_name":"Paleontology","level":1,"score":0.0},{"id":"https://openalex.org/C185592680","wikidata":"https://www.wikidata.org/wiki/Q2329","display_name":"Chemistry","level":0,"score":0.0},{"id":"https://openalex.org/C86803240","wikidata":"https://www.wikidata.org/wiki/Q420","display_name":"Biology","level":0,"score":0.0},{"id":"https://openalex.org/C115624301","wikidata":"https://www.wikidata.org/wiki/Q895901","display_name":"Crystal structure","level":2,"score":0.0}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1007/bf02280886","is_oa":false,"landing_page_url":"https://doi.org/10.1007/bf02280886","pdf_url":null,"source":{"id":"https://openalex.org/S35593046","display_name":"Computing","issn_l":"0010-485X","issn":["0010-485X","1436-5057"],"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":"Computing","raw_type":"journal-article"}],"best_oa_location":null,"sustainable_development_goals":[{"score":0.6499999761581421,"id":"https://metadata.un.org/sdg/4","display_name":"Quality Education"}],"awards":[],"funders":[],"has_content":{"grobid_xml":false,"pdf":false},"content_urls":null,"referenced_works_count":1,"referenced_works":["https://openalex.org/W2062920098"],"related_works":["https://openalex.org/W2964187826","https://openalex.org/W4243146628","https://openalex.org/W2052280100","https://openalex.org/W4296970324","https://openalex.org/W4255035161","https://openalex.org/W3030741710","https://openalex.org/W2126134344","https://openalex.org/W309943450","https://openalex.org/W2070029222","https://openalex.org/W5846485"],"abstract_inverted_index":null,"counts_by_year":[],"updated_date":"2025-11-06T03:46:38.306776","created_date":"2025-10-10T00:00:00"}
