{"id":"https://openalex.org/W2158813046","doi":"https://doi.org/10.1109/iretelc.1962.5407917","title":"A Survey of Regular Expressions and Their Applications","display_name":"A Survey of Regular Expressions and Their Applications","publication_year":1962,"publication_date":"1962-06-01","ids":{"openalex":"https://openalex.org/W2158813046","doi":"https://doi.org/10.1109/iretelc.1962.5407917","mag":"2158813046"},"language":"en","primary_location":{"id":"doi:10.1109/iretelc.1962.5407917","is_oa":false,"landing_page_url":"https://doi.org/10.1109/iretelc.1962.5407917","pdf_url":null,"source":{"id":"https://openalex.org/S172998616","display_name":"IRE Transactions on Electronic Computers","issn_l":"0367-9950","issn":["0367-9950"],"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/P4310319808","host_organization_name":"Institute of Electrical and Electronics Engineers","host_organization_lineage":["https://openalex.org/P4310319808"],"host_organization_lineage_names":["Institute of Electrical and Electronics Engineers"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"IRE Transactions on Electronic Computers","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/A5016883956","display_name":"Janusz Brzozowski","orcid":"https://orcid.org/0000-0003-3390-2767"},"institutions":[{"id":"https://openalex.org/I20089843","display_name":"Princeton University","ror":"https://ror.org/00hx57361","country_code":"US","type":"education","lineage":["https://openalex.org/I20089843"]}],"countries":["US"],"is_corresponding":true,"raw_author_name":"Janusz A. Brzozowski","raw_affiliation_strings":["Department of Electrical Engineering, Princeton University, Princeton, NJ, USA"],"affiliations":[{"raw_affiliation_string":"Department of Electrical Engineering, Princeton University, Princeton, NJ, USA","institution_ids":["https://openalex.org/I20089843"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":1,"corresponding_author_ids":["https://openalex.org/A5016883956"],"corresponding_institution_ids":["https://openalex.org/I20089843"],"apc_list":null,"apc_paid":null,"fwci":5.5788,"has_fulltext":false,"cited_by_count":46,"citation_normalized_percentile":{"value":0.96372733,"is_in_top_1_percent":false,"is_in_top_10_percent":true},"cited_by_percentile_year":{"min":89,"max":96},"biblio":{"volume":"EC-11","issue":"3","first_page":"324","last_page":"335"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T11567","display_name":"semigroups and automata theory","score":0.9995999932289124,"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":0.9995999932289124,"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/T11269","display_name":"Algorithms and Data Compression","score":0.9986000061035156,"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/T12002","display_name":"Computability, Logic, AI Algorithms","score":0.9976999759674072,"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/notation","display_name":"Notation","score":0.6362411975860596},{"id":"https://openalex.org/keywords/regular-expression","display_name":"Regular expression","score":0.6186044812202454},{"id":"https://openalex.org/keywords/expression","display_name":"Expression (computer science)","score":0.5977298617362976},{"id":"https://openalex.org/keywords/algebraic-expression","display_name":"Algebraic expression","score":0.5858322978019714},{"id":"https://openalex.org/keywords/sequential-logic","display_name":"Sequential logic","score":0.5828722715377808},{"id":"https://openalex.org/keywords/electronic-circuit","display_name":"Electronic circuit","score":0.5299457311630249},{"id":"https://openalex.org/keywords/terminology","display_name":"Terminology","score":0.5141122937202454},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.5072205066680908},{"id":"https://openalex.org/keywords/state","display_name":"State (computer science)","score":0.49460169672966003},{"id":"https://openalex.org/keywords/relation","display_name":"Relation (database)","score":0.4631355106830597},{"id":"https://openalex.org/keywords/boolean-function","display_name":"Boolean function","score":0.4480455815792084},{"id":"https://openalex.org/keywords/circuit-diagram","display_name":"Circuit diagram","score":0.435200035572052},{"id":"https://openalex.org/keywords/algebraic-number","display_name":"Algebraic number","score":0.4338107109069824},{"id":"https://openalex.org/keywords/state-diagram","display_name":"State diagram","score":0.4139529764652252},{"id":"https://openalex.org/keywords/algorithm","display_name":"Algorithm","score":0.4134443402290344},{"id":"https://openalex.org/keywords/mathematics","display_name":"Mathematics","score":0.40894025564193726},{"id":"https://openalex.org/keywords/theoretical-computer-science","display_name":"Theoretical computer science","score":0.402823805809021},{"id":"https://openalex.org/keywords/arithmetic","display_name":"Arithmetic","score":0.2783259451389313},{"id":"https://openalex.org/keywords/logic-gate","display_name":"Logic gate","score":0.23330014944076538},{"id":"https://openalex.org/keywords/programming-language","display_name":"Programming language","score":0.11772191524505615},{"id":"https://openalex.org/keywords/data-mining","display_name":"Data mining","score":0.08418259024620056},{"id":"https://openalex.org/keywords/electronic-engineering","display_name":"Electronic engineering","score":0.08055776357650757}],"concepts":[{"id":"https://openalex.org/C45357846","wikidata":"https://www.wikidata.org/wiki/Q2001982","display_name":"Notation","level":2,"score":0.6362411975860596},{"id":"https://openalex.org/C121329065","wikidata":"https://www.wikidata.org/wiki/Q185612","display_name":"Regular expression","level":2,"score":0.6186044812202454},{"id":"https://openalex.org/C90559484","wikidata":"https://www.wikidata.org/wiki/Q778379","display_name":"Expression (computer science)","level":2,"score":0.5977298617362976},{"id":"https://openalex.org/C18912844","wikidata":"https://www.wikidata.org/wiki/Q4724001","display_name":"Algebraic expression","level":3,"score":0.5858322978019714},{"id":"https://openalex.org/C187075797","wikidata":"https://www.wikidata.org/wiki/Q173245","display_name":"Sequential logic","level":3,"score":0.5828722715377808},{"id":"https://openalex.org/C134146338","wikidata":"https://www.wikidata.org/wiki/Q1815901","display_name":"Electronic circuit","level":2,"score":0.5299457311630249},{"id":"https://openalex.org/C547195049","wikidata":"https://www.wikidata.org/wiki/Q1725664","display_name":"Terminology","level":2,"score":0.5141122937202454},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.5072205066680908},{"id":"https://openalex.org/C48103436","wikidata":"https://www.wikidata.org/wiki/Q599031","display_name":"State (computer science)","level":2,"score":0.49460169672966003},{"id":"https://openalex.org/C25343380","wikidata":"https://www.wikidata.org/wiki/Q277521","display_name":"Relation (database)","level":2,"score":0.4631355106830597},{"id":"https://openalex.org/C187455244","wikidata":"https://www.wikidata.org/wiki/Q942353","display_name":"Boolean function","level":2,"score":0.4480455815792084},{"id":"https://openalex.org/C39799792","wikidata":"https://www.wikidata.org/wiki/Q1045991","display_name":"Circuit diagram","level":2,"score":0.435200035572052},{"id":"https://openalex.org/C9376300","wikidata":"https://www.wikidata.org/wiki/Q168817","display_name":"Algebraic number","level":2,"score":0.4338107109069824},{"id":"https://openalex.org/C16671368","wikidata":"https://www.wikidata.org/wiki/Q230885","display_name":"State diagram","level":3,"score":0.4139529764652252},{"id":"https://openalex.org/C11413529","wikidata":"https://www.wikidata.org/wiki/Q8366","display_name":"Algorithm","level":1,"score":0.4134443402290344},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.40894025564193726},{"id":"https://openalex.org/C80444323","wikidata":"https://www.wikidata.org/wiki/Q2878974","display_name":"Theoretical computer science","level":1,"score":0.402823805809021},{"id":"https://openalex.org/C94375191","wikidata":"https://www.wikidata.org/wiki/Q11205","display_name":"Arithmetic","level":1,"score":0.2783259451389313},{"id":"https://openalex.org/C131017901","wikidata":"https://www.wikidata.org/wiki/Q170451","display_name":"Logic gate","level":2,"score":0.23330014944076538},{"id":"https://openalex.org/C199360897","wikidata":"https://www.wikidata.org/wiki/Q9143","display_name":"Programming language","level":1,"score":0.11772191524505615},{"id":"https://openalex.org/C124101348","wikidata":"https://www.wikidata.org/wiki/Q172491","display_name":"Data mining","level":1,"score":0.08418259024620056},{"id":"https://openalex.org/C24326235","wikidata":"https://www.wikidata.org/wiki/Q126095","display_name":"Electronic engineering","level":1,"score":0.08055776357650757},{"id":"https://openalex.org/C138885662","wikidata":"https://www.wikidata.org/wiki/Q5891","display_name":"Philosophy","level":0,"score":0.0},{"id":"https://openalex.org/C134306372","wikidata":"https://www.wikidata.org/wiki/Q7754","display_name":"Mathematical analysis","level":1,"score":0.0},{"id":"https://openalex.org/C127413603","wikidata":"https://www.wikidata.org/wiki/Q11023","display_name":"Engineering","level":0,"score":0.0},{"id":"https://openalex.org/C41895202","wikidata":"https://www.wikidata.org/wiki/Q8162","display_name":"Linguistics","level":1,"score":0.0},{"id":"https://openalex.org/C119599485","wikidata":"https://www.wikidata.org/wiki/Q43035","display_name":"Electrical engineering","level":1,"score":0.0}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1109/iretelc.1962.5407917","is_oa":false,"landing_page_url":"https://doi.org/10.1109/iretelc.1962.5407917","pdf_url":null,"source":{"id":"https://openalex.org/S172998616","display_name":"IRE Transactions on Electronic Computers","issn_l":"0367-9950","issn":["0367-9950"],"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/P4310319808","host_organization_name":"Institute of Electrical and Electronics Engineers","host_organization_lineage":["https://openalex.org/P4310319808"],"host_organization_lineage_names":["Institute of Electrical and Electronics Engineers"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"IRE Transactions on Electronic Computers","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":12,"referenced_works":["https://openalex.org/W1587984077","https://openalex.org/W1975668807","https://openalex.org/W1988355680","https://openalex.org/W1995341919","https://openalex.org/W2054801208","https://openalex.org/W2075637111","https://openalex.org/W2075773711","https://openalex.org/W2088266018","https://openalex.org/W2089904802","https://openalex.org/W2129414328","https://openalex.org/W2140147817","https://openalex.org/W3177082579"],"related_works":["https://openalex.org/W1973087355","https://openalex.org/W2075637111","https://openalex.org/W2461750933","https://openalex.org/W2952430269","https://openalex.org/W4297878330","https://openalex.org/W2170158188","https://openalex.org/W1556499287","https://openalex.org/W2387073443","https://openalex.org/W2154250375","https://openalex.org/W2143325690"],"abstract_inverted_index":{"This":[0],"paper":[1],"is":[2],"an":[3],"exposition":[4],"of":[5,8,19,38,47,59,89,98],"the":[6,30,35,39,43,57],"theory":[7,50],"regular":[9,60,77,83,99],"expressions":[10,61],"and":[11,32,45,70,101],"its":[12],"applications":[13,102],"to":[14,62,74,103],"sequential":[15,48,63,68,91],"circuits.":[16],"The":[17,53],"results":[18],"several":[20],"authors":[21],"are":[22,51],"presented":[23,55],"in":[24,34],"a":[25,75,82,86,90],"unified":[26],"manner,":[27],"pointing":[28],"out":[29],"similarities":[31],"differences":[33],"various":[36],"treatments":[37],"subject.":[40],"Whenever":[41],"possible,":[42],"terminology":[44],"notation":[46],"circuit":[49],"used.":[52],"topics":[54],"include:":[56],"relation":[58],"circuits;":[64],"algorithms":[65],"for":[66,80],"constructing":[67],"circuits":[69],"state":[71,87,94],"diagrams":[72],"corresponding":[73],"given":[76],"expression;":[78],"methods":[79],"obtaining":[81],"expression":[84],"from":[85],"diagram":[88],"circuit,":[92],"improper":[93],"diagrams,":[95],"algebraic":[96],"properties":[97],"expressions,":[100],"codes.":[104]},"counts_by_year":[{"year":2025,"cited_by_count":2},{"year":2020,"cited_by_count":1}],"updated_date":"2025-11-06T03:46:38.306776","created_date":"2025-10-10T00:00:00"}