{"id":"https://openalex.org/W2044722895","doi":"https://doi.org/10.1080/00207160304676","title":"On Some Classes Of Contextual Grammars","display_name":"On Some Classes Of Contextual Grammars","publication_year":2003,"publication_date":"2003-02-01","ids":{"openalex":"https://openalex.org/W2044722895","doi":"https://doi.org/10.1080/00207160304676","mag":"2044722895"},"language":"en","primary_location":{"id":"doi:10.1080/00207160304676","is_oa":false,"landing_page_url":"https://doi.org/10.1080/00207160304676","pdf_url":null,"source":{"id":"https://openalex.org/S124867444","display_name":"International Journal of Computer Mathematics","issn_l":"0020-7160","issn":["0020-7160","1026-7425","1029-0265"],"is_oa":false,"is_in_doaj":false,"is_core":true,"host_organization":"https://openalex.org/P4310320547","host_organization_name":"Taylor & Francis","host_organization_lineage":["https://openalex.org/P4310320547"],"host_organization_lineage_names":["Taylor & Francis"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"International Journal of Computer Mathematics","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/A5063589100","display_name":"Shanker Krishna","orcid":"https://orcid.org/0000-0001-5325-0300"},"institutions":[{"id":"https://openalex.org/I24676775","display_name":"Indian Institute of Technology Madras","ror":"https://ror.org/03v0r5n49","country_code":"IN","type":"facility","lineage":["https://openalex.org/I24676775"]}],"countries":["IN"],"is_corresponding":true,"raw_author_name":"S. N. Krishna","raw_affiliation_strings":["Department of Mathematics , Indian Institute of Technology , Madras, Chennai-36, Tamilnadu, India"],"affiliations":[{"raw_affiliation_string":"Department of Mathematics , Indian Institute of Technology , Madras, Chennai-36, Tamilnadu, India","institution_ids":["https://openalex.org/I24676775"]}]},{"author_position":"middle","author":{"id":null,"display_name":"K. Lakshmanan","orcid":null},"institutions":[{"id":"https://openalex.org/I24676775","display_name":"Indian Institute of Technology Madras","ror":"https://ror.org/03v0r5n49","country_code":"IN","type":"facility","lineage":["https://openalex.org/I24676775"]}],"countries":["IN"],"is_corresponding":false,"raw_author_name":"K. Lakshmanan","raw_affiliation_strings":["Department of Mathematics , Indian Institute of Technology , Madras, Chennai-36, Tamilnadu, India"],"affiliations":[{"raw_affiliation_string":"Department of Mathematics , Indian Institute of Technology , Madras, Chennai-36, Tamilnadu, India","institution_ids":["https://openalex.org/I24676775"]}]},{"author_position":"last","author":{"id":null,"display_name":"R. Rama","orcid":null},"institutions":[{"id":"https://openalex.org/I24676775","display_name":"Indian Institute of Technology Madras","ror":"https://ror.org/03v0r5n49","country_code":"IN","type":"facility","lineage":["https://openalex.org/I24676775"]}],"countries":["IN"],"is_corresponding":false,"raw_author_name":"R. Rama","raw_affiliation_strings":["Department of Mathematics , Indian Institute of Technology , Madras, Chennai-36, Tamilnadu, India"],"affiliations":[{"raw_affiliation_string":"Department of Mathematics , Indian Institute of Technology , Madras, Chennai-36, Tamilnadu, India","institution_ids":["https://openalex.org/I24676775"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":3,"corresponding_author_ids":["https://openalex.org/A5063589100"],"corresponding_institution_ids":["https://openalex.org/I24676775"],"apc_list":null,"apc_paid":null,"fwci":0.3432,"has_fulltext":false,"cited_by_count":6,"citation_normalized_percentile":{"value":0.57369938,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":89,"max":94},"biblio":{"volume":"80","issue":"2","first_page":"151","last_page":"164"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T12029","display_name":"DNA and Biological Computing","score":0.9998999834060669,"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"}},"topics":[{"id":"https://openalex.org/T12029","display_name":"DNA and Biological Computing","score":0.9998999834060669,"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/T11269","display_name":"Algorithms and Data Compression","score":0.9993000030517578,"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/T11567","display_name":"semigroups and automata theory","score":0.9991999864578247,"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/rule-based-machine-translation","display_name":"Rule-based machine translation","score":0.8665431141853333},{"id":"https://openalex.org/keywords/tree-adjoining-grammar","display_name":"Tree-adjoining grammar","score":0.732255220413208},{"id":"https://openalex.org/keywords/context-sensitive-grammar","display_name":"Context-sensitive grammar","score":0.6838744878768921},{"id":"https://openalex.org/keywords/indexed-grammar","display_name":"Indexed grammar","score":0.6635776162147522},{"id":"https://openalex.org/keywords/context-free-grammar","display_name":"Context-free grammar","score":0.6032956838607788},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.601924479007721},{"id":"https://openalex.org/keywords/l-attributed-grammar","display_name":"L-attributed grammar","score":0.5946705341339111},{"id":"https://openalex.org/keywords/embedded-pushdown-automaton","display_name":"Embedded pushdown automaton","score":0.5782148838043213},{"id":"https://openalex.org/keywords/phrase-structure-grammar","display_name":"Phrase structure grammar","score":0.541465163230896},{"id":"https://openalex.org/keywords/generative-grammar","display_name":"Generative grammar","score":0.4979686737060547},{"id":"https://openalex.org/keywords/stochastic-context-free-grammar","display_name":"Stochastic context-free grammar","score":0.4944331645965576},{"id":"https://openalex.org/keywords/context","display_name":"Context (archaeology)","score":0.4552820920944214},{"id":"https://openalex.org/keywords/artificial-intelligence","display_name":"Artificial intelligence","score":0.4205837845802307},{"id":"https://openalex.org/keywords/natural-language-processing","display_name":"Natural language processing","score":0.3812488317489624},{"id":"https://openalex.org/keywords/mathematics","display_name":"Mathematics","score":0.37315791845321655},{"id":"https://openalex.org/keywords/theoretical-computer-science","display_name":"Theoretical computer science","score":0.3511924147605896}],"concepts":[{"id":"https://openalex.org/C53893814","wikidata":"https://www.wikidata.org/wiki/Q7378909","display_name":"Rule-based machine translation","level":2,"score":0.8665431141853333},{"id":"https://openalex.org/C134083981","wikidata":"https://www.wikidata.org/wiki/Q1754022","display_name":"Tree-adjoining grammar","level":4,"score":0.732255220413208},{"id":"https://openalex.org/C125950753","wikidata":"https://www.wikidata.org/wiki/Q908674","display_name":"Context-sensitive grammar","level":4,"score":0.6838744878768921},{"id":"https://openalex.org/C79243999","wikidata":"https://www.wikidata.org/wiki/Q6590011","display_name":"Indexed grammar","level":5,"score":0.6635776162147522},{"id":"https://openalex.org/C97212296","wikidata":"https://www.wikidata.org/wiki/Q338047","display_name":"Context-free grammar","level":3,"score":0.6032956838607788},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.601924479007721},{"id":"https://openalex.org/C67621940","wikidata":"https://www.wikidata.org/wiki/Q3113340","display_name":"L-attributed grammar","level":4,"score":0.5946705341339111},{"id":"https://openalex.org/C27034413","wikidata":"https://www.wikidata.org/wiki/Q5370010","display_name":"Embedded pushdown automaton","level":5,"score":0.5782148838043213},{"id":"https://openalex.org/C29184939","wikidata":"https://www.wikidata.org/wiki/Q1134367","display_name":"Phrase structure grammar","level":4,"score":0.541465163230896},{"id":"https://openalex.org/C39890363","wikidata":"https://www.wikidata.org/wiki/Q36108","display_name":"Generative grammar","level":2,"score":0.4979686737060547},{"id":"https://openalex.org/C199624470","wikidata":"https://www.wikidata.org/wiki/Q2377216","display_name":"Stochastic context-free grammar","level":5,"score":0.4944331645965576},{"id":"https://openalex.org/C2779343474","wikidata":"https://www.wikidata.org/wiki/Q3109175","display_name":"Context (archaeology)","level":2,"score":0.4552820920944214},{"id":"https://openalex.org/C154945302","wikidata":"https://www.wikidata.org/wiki/Q11660","display_name":"Artificial intelligence","level":1,"score":0.4205837845802307},{"id":"https://openalex.org/C204321447","wikidata":"https://www.wikidata.org/wiki/Q30642","display_name":"Natural language processing","level":1,"score":0.3812488317489624},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.37315791845321655},{"id":"https://openalex.org/C80444323","wikidata":"https://www.wikidata.org/wiki/Q2878974","display_name":"Theoretical computer science","level":1,"score":0.3511924147605896},{"id":"https://openalex.org/C151730666","wikidata":"https://www.wikidata.org/wiki/Q7205","display_name":"Paleontology","level":1,"score":0.0},{"id":"https://openalex.org/C86803240","wikidata":"https://www.wikidata.org/wiki/Q420","display_name":"Biology","level":0,"score":0.0}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1080/00207160304676","is_oa":false,"landing_page_url":"https://doi.org/10.1080/00207160304676","pdf_url":null,"source":{"id":"https://openalex.org/S124867444","display_name":"International Journal of Computer Mathematics","issn_l":"0020-7160","issn":["0020-7160","1026-7425","1029-0265"],"is_oa":false,"is_in_doaj":false,"is_core":true,"host_organization":"https://openalex.org/P4310320547","host_organization_name":"Taylor & Francis","host_organization_lineage":["https://openalex.org/P4310320547"],"host_organization_lineage_names":["Taylor & Francis"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"International Journal of Computer Mathematics","raw_type":"journal-article"}],"best_oa_location":null,"sustainable_development_goals":[{"display_name":"Quality Education","id":"https://metadata.un.org/sdg/4","score":0.6200000047683716}],"awards":[],"funders":[],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":8,"referenced_works":["https://openalex.org/W4352385","https://openalex.org/W1584587517","https://openalex.org/W1974130087","https://openalex.org/W2067894456","https://openalex.org/W2151892345","https://openalex.org/W2283023572","https://openalex.org/W4231980886","https://openalex.org/W4245888925"],"related_works":["https://openalex.org/W2403874525","https://openalex.org/W1980918784","https://openalex.org/W2041988689","https://openalex.org/W59084530","https://openalex.org/W1608157979","https://openalex.org/W1557335907","https://openalex.org/W2345119559","https://openalex.org/W1846567150","https://openalex.org/W2055334547","https://openalex.org/W2070208002"],"abstract_inverted_index":{"In":[0],"this":[1,33,87],"paper,":[2],"we":[3,35],"introduce":[4,49],"some":[5],"new":[6],"variants":[7],"of":[8,20,28,86,92],"contextual":[9,22,52,73,99],"grammars":[10,53,74],"and":[11,54,97],"investigate":[12],"their":[13],"generative":[14,57,84],"power.":[15],"We'consider":[16],"a":[17,37],"restricted":[18],"version":[19],"depth-first":[21],"grammars,":[23],"which":[24,77],"depends":[25],"on":[26],"length":[27],"the":[29,40,60,83,90],"inserting":[30],"contexts.":[31],"Using":[32],"variant,":[34],"give":[36],"solution":[38],"to":[39],"open":[41],"problem":[42],"P14":[43],"listed":[44],"in":[45],"[8].":[46],"We":[47,81],"also":[48],"random":[50],"context":[51],"compare":[55,82],"its":[56],"power":[58,85],"with":[59,89],"families":[61,91],"IC":[62],",":[63,65,67,69],"ICC":[64],"EC":[66],"ECC":[68],"TC":[70],".":[71],"Time-varying":[72],"are":[75],"introduced":[76],"resemble":[78],"time-varying":[79],"grammars.":[80,100],"variant":[88],"internal,":[93],"external,":[94],"total,":[95],"matrix,":[96],"programmed":[98]},"counts_by_year":[{"year":2013,"cited_by_count":1}],"updated_date":"2026-04-21T08:09:41.155169","created_date":"2025-10-10T00:00:00"}
