{"id":"https://openalex.org/W1537995368","doi":"https://doi.org/10.1016/s1571-0661(04)80083-5","title":"Bisimulation in Untyped Lambda Calculus:","display_name":"Bisimulation in Untyped Lambda Calculus:","publication_year":1999,"publication_date":"1999-01-01","ids":{"openalex":"https://openalex.org/W1537995368","doi":"https://doi.org/10.1016/s1571-0661(04)80083-5","mag":"1537995368"},"language":"en","primary_location":{"id":"doi:10.1016/s1571-0661(04)80083-5","is_oa":true,"landing_page_url":"https://doi.org/10.1016/s1571-0661(04)80083-5","pdf_url":"https://www.sciencedirect.com/science/article/pii/S1571066104800835/pdf","source":{"id":"https://openalex.org/S50368787","display_name":"Electronic Notes in Theoretical Computer Science","issn_l":"1571-0661","issn":["1571-0661"],"is_oa":true,"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":"cc-by-nc-nd","license_id":"https://openalex.org/licenses/cc-by-nc-nd","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Electronic Notes in Theoretical Computer Science","raw_type":"journal-article"},"type":"article","indexed_in":["crossref"],"open_access":{"is_oa":true,"oa_status":"diamond","oa_url":"https://www.sciencedirect.com/science/article/pii/S1571066104800835/pdf","any_repository_has_fulltext":false},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5111582061","display_name":"S\u00f8ren B. Lassen","orcid":null},"institutions":[{"id":"https://openalex.org/I241749","display_name":"University of Cambridge","ror":"https://ror.org/013meh722","country_code":"GB","type":"education","lineage":["https://openalex.org/I241749"]}],"countries":["GB"],"is_corresponding":true,"raw_author_name":"S.B. Lassen","raw_affiliation_strings":["University of Cambridge Computer Laboratory, Pembroke Street, Cambridge CB2 3QG, United Kingdom","University of Cambridge Computer Laboratory, Pembroke Street, Cambridge CB2 3QG, United Kingdom#TAB#"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"University of Cambridge Computer Laboratory, Pembroke Street, Cambridge CB2 3QG, United Kingdom","institution_ids":["https://openalex.org/I241749"]},{"raw_affiliation_string":"University of Cambridge Computer Laboratory, Pembroke Street, Cambridge CB2 3QG, United Kingdom#TAB#","institution_ids":["https://openalex.org/I241749"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":1,"corresponding_author_ids":["https://openalex.org/A5111582061"],"corresponding_institution_ids":["https://openalex.org/I241749"],"apc_list":null,"apc_paid":null,"fwci":0.5394,"has_fulltext":true,"cited_by_count":43,"citation_normalized_percentile":{"value":0.74836173,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":89,"max":99},"biblio":{"volume":"20","issue":null,"first_page":"346","last_page":"374"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10126","display_name":"Logic, programming, and type systems","score":0.9994999766349792,"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/T10126","display_name":"Logic, programming, and type systems","score":0.9994999766349792,"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/T11010","display_name":"Logic, Reasoning, and Knowledge","score":0.9883999824523926,"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":0.9853000044822693,"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/bisimulation","display_name":"Bisimulation","score":0.9202767610549927},{"id":"https://openalex.org/keywords/mathematical-proof","display_name":"Mathematical proof","score":0.6737470030784607},{"id":"https://openalex.org/keywords/mathematics","display_name":"Mathematics","score":0.5901973843574524},{"id":"https://openalex.org/keywords/congruence","display_name":"Congruence (geometry)","score":0.5523298382759094},{"id":"https://openalex.org/keywords/equivalence","display_name":"Equivalence (formal languages)","score":0.5269328355789185},{"id":"https://openalex.org/keywords/combinatory-logic","display_name":"Combinatory logic","score":0.4854300618171692},{"id":"https://openalex.org/keywords/lambda-calculus","display_name":"Lambda calculus","score":0.456320583820343},{"id":"https://openalex.org/keywords/fixed-point","display_name":"Fixed point","score":0.4545045495033264},{"id":"https://openalex.org/keywords/tree","display_name":"Tree (set theory)","score":0.44344979524612427},{"id":"https://openalex.org/keywords/simply-typed-lambda-calculus","display_name":"Simply typed lambda calculus","score":0.4161016047000885},{"id":"https://openalex.org/keywords/discrete-mathematics","display_name":"Discrete mathematics","score":0.3850463032722473},{"id":"https://openalex.org/keywords/algebra-over-a-field","display_name":"Algebra over a field","score":0.352457731962204},{"id":"https://openalex.org/keywords/calculus","display_name":"Calculus (dental)","score":0.3501703143119812},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.3231823146343231},{"id":"https://openalex.org/keywords/pure-mathematics","display_name":"Pure mathematics","score":0.2580105662345886},{"id":"https://openalex.org/keywords/typed-lambda-calculus","display_name":"Typed lambda calculus","score":0.24637481570243835},{"id":"https://openalex.org/keywords/combinatorics","display_name":"Combinatorics","score":0.17328807711601257},{"id":"https://openalex.org/keywords/programming-language","display_name":"Programming language","score":0.10993379354476929}],"concepts":[{"id":"https://openalex.org/C135315306","wikidata":"https://www.wikidata.org/wiki/Q866364","display_name":"Bisimulation","level":2,"score":0.9202767610549927},{"id":"https://openalex.org/C108710211","wikidata":"https://www.wikidata.org/wiki/Q11538","display_name":"Mathematical proof","level":2,"score":0.6737470030784607},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.5901973843574524},{"id":"https://openalex.org/C132074034","wikidata":"https://www.wikidata.org/wiki/Q154210","display_name":"Congruence (geometry)","level":2,"score":0.5523298382759094},{"id":"https://openalex.org/C2780069185","wikidata":"https://www.wikidata.org/wiki/Q7977945","display_name":"Equivalence (formal languages)","level":2,"score":0.5269328355789185},{"id":"https://openalex.org/C79678938","wikidata":"https://www.wikidata.org/wiki/Q1481571","display_name":"Combinatory logic","level":2,"score":0.4854300618171692},{"id":"https://openalex.org/C135790938","wikidata":"https://www.wikidata.org/wiki/Q242028","display_name":"Lambda calculus","level":2,"score":0.456320583820343},{"id":"https://openalex.org/C61445026","wikidata":"https://www.wikidata.org/wiki/Q217608","display_name":"Fixed point","level":2,"score":0.4545045495033264},{"id":"https://openalex.org/C113174947","wikidata":"https://www.wikidata.org/wiki/Q2859736","display_name":"Tree (set theory)","level":2,"score":0.44344979524612427},{"id":"https://openalex.org/C61237538","wikidata":"https://www.wikidata.org/wiki/Q855192","display_name":"Simply typed lambda calculus","level":4,"score":0.4161016047000885},{"id":"https://openalex.org/C118615104","wikidata":"https://www.wikidata.org/wiki/Q121416","display_name":"Discrete mathematics","level":1,"score":0.3850463032722473},{"id":"https://openalex.org/C136119220","wikidata":"https://www.wikidata.org/wiki/Q1000660","display_name":"Algebra over a field","level":2,"score":0.352457731962204},{"id":"https://openalex.org/C2777686260","wikidata":"https://www.wikidata.org/wiki/Q144037","display_name":"Calculus (dental)","level":2,"score":0.3501703143119812},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.3231823146343231},{"id":"https://openalex.org/C202444582","wikidata":"https://www.wikidata.org/wiki/Q837863","display_name":"Pure mathematics","level":1,"score":0.2580105662345886},{"id":"https://openalex.org/C142156749","wikidata":"https://www.wikidata.org/wiki/Q2607208","display_name":"Typed lambda calculus","level":3,"score":0.24637481570243835},{"id":"https://openalex.org/C114614502","wikidata":"https://www.wikidata.org/wiki/Q76592","display_name":"Combinatorics","level":1,"score":0.17328807711601257},{"id":"https://openalex.org/C199360897","wikidata":"https://www.wikidata.org/wiki/Q9143","display_name":"Programming language","level":1,"score":0.10993379354476929},{"id":"https://openalex.org/C71924100","wikidata":"https://www.wikidata.org/wiki/Q11190","display_name":"Medicine","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/C199343813","wikidata":"https://www.wikidata.org/wiki/Q12128","display_name":"Dentistry","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}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1016/s1571-0661(04)80083-5","is_oa":true,"landing_page_url":"https://doi.org/10.1016/s1571-0661(04)80083-5","pdf_url":"https://www.sciencedirect.com/science/article/pii/S1571066104800835/pdf","source":{"id":"https://openalex.org/S50368787","display_name":"Electronic Notes in Theoretical Computer Science","issn_l":"1571-0661","issn":["1571-0661"],"is_oa":true,"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":"cc-by-nc-nd","license_id":"https://openalex.org/licenses/cc-by-nc-nd","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Electronic Notes in Theoretical Computer Science","raw_type":"journal-article"}],"best_oa_location":{"id":"doi:10.1016/s1571-0661(04)80083-5","is_oa":true,"landing_page_url":"https://doi.org/10.1016/s1571-0661(04)80083-5","pdf_url":"https://www.sciencedirect.com/science/article/pii/S1571066104800835/pdf","source":{"id":"https://openalex.org/S50368787","display_name":"Electronic Notes in Theoretical Computer Science","issn_l":"1571-0661","issn":["1571-0661"],"is_oa":true,"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":"cc-by-nc-nd","license_id":"https://openalex.org/licenses/cc-by-nc-nd","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Electronic Notes in Theoretical Computer Science","raw_type":"journal-article"},"sustainable_development_goals":[],"awards":[],"funders":[],"has_content":{"pdf":true,"grobid_xml":true},"content_urls":{"pdf":"https://content.openalex.org/works/W1537995368.pdf","grobid_xml":"https://content.openalex.org/works/W1537995368.grobid-xml"},"referenced_works_count":25,"referenced_works":["https://openalex.org/W146427529","https://openalex.org/W172004165","https://openalex.org/W1493647767","https://openalex.org/W1499149072","https://openalex.org/W1513445195","https://openalex.org/W1537537016","https://openalex.org/W1546856751","https://openalex.org/W1687592709","https://openalex.org/W1983904532","https://openalex.org/W1987868327","https://openalex.org/W2036605992","https://openalex.org/W2070032247","https://openalex.org/W2088941870","https://openalex.org/W2092367588","https://openalex.org/W2128995870","https://openalex.org/W2141568518","https://openalex.org/W2154273644","https://openalex.org/W2154854226","https://openalex.org/W2165407648","https://openalex.org/W2184268586","https://openalex.org/W2214437647","https://openalex.org/W2290372454","https://openalex.org/W6606951199","https://openalex.org/W6681090851","https://openalex.org/W7053504691"],"related_works":["https://openalex.org/W2612830858","https://openalex.org/W2036107204","https://openalex.org/W1592479913","https://openalex.org/W1571094673","https://openalex.org/W2803077385","https://openalex.org/W154751840","https://openalex.org/W2027907817","https://openalex.org/W4238162019","https://openalex.org/W2997902268","https://openalex.org/W1482362545"],"abstract_inverted_index":{"On":[0],"the":[1,17,57,70],"basis":[2],"of":[3,8,16,69,75,83],"an":[4,24],"operational":[5],"bisimulation":[6,50,84],"account":[7],"B\u00f6hm":[9,18,29],"tree":[10,19,30,42],"equivalence,":[11],"a":[12,45,65],"novel":[13],"operationally-based":[14],"development":[15],"theory":[20],"is":[21,34,54,61],"presented,":[22],"including":[23],"elementary":[25],"congruence":[26,58],"proof":[27,47,68],"for":[28,87,100],"equivalence.":[31],"The":[32,79],"approach":[33],"also":[35],"applied":[36],"to":[37,52,63,93],"other":[38],"sensible":[39,88],"and":[40,85],"lazy":[41,101],"theories.":[43],"Finally,":[44],"syntactic":[46,67],"principle,":[48],"called":[49],"up":[51],"context,":[53],"derived":[55],"from":[56],"proofs.":[59],"It":[60],"used":[62],"give":[64],"simple":[66],"least":[71],"fixed":[72,76],"point":[73,77],"property":[74],"combinators.":[78],"paper":[80],"surveys":[81],"notions":[82],"trees":[86],"\u03bb-theories":[89,102],"based":[90,103],"on":[91,104],"reduction":[92],"head":[94,106],"normal":[95,107],"forms":[96],"as":[97,99],"well":[98],"weak":[105],"forms.":[108]},"counts_by_year":[{"year":2026,"cited_by_count":1},{"year":2025,"cited_by_count":3},{"year":2024,"cited_by_count":3},{"year":2023,"cited_by_count":1},{"year":2022,"cited_by_count":3},{"year":2021,"cited_by_count":1},{"year":2020,"cited_by_count":2},{"year":2019,"cited_by_count":6},{"year":2018,"cited_by_count":3},{"year":2017,"cited_by_count":3},{"year":2015,"cited_by_count":2},{"year":2014,"cited_by_count":3},{"year":2012,"cited_by_count":1}],"updated_date":"2026-08-01T09:00:35.917206","created_date":"2025-10-10T00:00:00"}
