{"id":"https://openalex.org/W2080532451","doi":"https://doi.org/10.1016/s0022-0000(76)80026-8","title":"A useful device for showing the solvability of some decision problems","display_name":"A useful device for showing the solvability of some decision problems","publication_year":1976,"publication_date":"1976-10-01","ids":{"openalex":"https://openalex.org/W2080532451","doi":"https://doi.org/10.1016/s0022-0000(76)80026-8","mag":"2080532451"},"language":"en","primary_location":{"id":"doi:10.1016/s0022-0000(76)80026-8","is_oa":false,"landing_page_url":"https://doi.org/10.1016/s0022-0000(76)80026-8","pdf_url":null,"source":{"id":"https://openalex.org/S141020589","display_name":"Journal of Computer and System Sciences","issn_l":"0022-0000","issn":["0022-0000","1090-2724"],"is_oa":false,"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":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Journal of Computer and System Sciences","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/A5110211208","display_name":"\u00d3scar H. Ibarra","orcid":null},"institutions":[{"id":"https://openalex.org/I130238516","display_name":"University of Minnesota","ror":"https://ror.org/017zqws13","country_code":"US","type":"education","lineage":["https://openalex.org/I130238516"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Oscar H. Ibarra","raw_affiliation_strings":["Department of Computer Science, University of Minnesota, Minneapolis, Minnesota 55455, USA"],"affiliations":[{"raw_affiliation_string":"Department of Computer Science, University of Minnesota, Minneapolis, Minnesota 55455, USA","institution_ids":["https://openalex.org/I130238516"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5031294259","display_name":"Chul E. Kim","orcid":null},"institutions":[{"id":"https://openalex.org/I130238516","display_name":"University of Minnesota","ror":"https://ror.org/017zqws13","country_code":"US","type":"education","lineage":["https://openalex.org/I130238516"]}],"countries":["US"],"is_corresponding":true,"raw_author_name":"Chul E. Kim","raw_affiliation_strings":["Department of Computer Science, University of Minnesota, Minneapolis, Minnesota 55455, USA"],"affiliations":[{"raw_affiliation_string":"Department of Computer Science, University of Minnesota, Minneapolis, Minnesota 55455, USA","institution_ids":["https://openalex.org/I130238516"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":2,"corresponding_author_ids":["https://openalex.org/A5031294259"],"corresponding_institution_ids":["https://openalex.org/I130238516"],"apc_list":{"value":2520,"currency":"USD","value_usd":2520},"apc_paid":null,"fwci":1.176,"has_fulltext":false,"cited_by_count":16,"citation_normalized_percentile":{"value":0.78604869,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":null,"biblio":{"volume":"13","issue":"2","first_page":"153","last_page":"160"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T11567","display_name":"semigroups and automata theory","score":0.9998999834060669,"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":0.9998999834060669,"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/T11130","display_name":"Coding theory and cryptography","score":0.9911999702453613,"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/T11269","display_name":"Algorithms and Data Compression","score":0.9891999959945679,"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"}}],"keywords":[{"id":"https://openalex.org/keywords/pushdown-automaton","display_name":"Pushdown automaton","score":0.6944979429244995},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.6753542423248291},{"id":"https://openalex.org/keywords/decision-problem","display_name":"Decision problem","score":0.5835016965866089},{"id":"https://openalex.org/keywords/automaton","display_name":"Automaton","score":0.5755087733268738},{"id":"https://openalex.org/keywords/theoretical-computer-science","display_name":"Theoretical computer science","score":0.4417426288127899},{"id":"https://openalex.org/keywords/code","display_name":"Code (set theory)","score":0.4350894093513489},{"id":"https://openalex.org/keywords/deterministic-pushdown-automaton","display_name":"Deterministic pushdown automaton","score":0.41728007793426514},{"id":"https://openalex.org/keywords/algorithm","display_name":"Algorithm","score":0.33470413088798523},{"id":"https://openalex.org/keywords/programming-language","display_name":"Programming language","score":0.24098455905914307},{"id":"https://openalex.org/keywords/set","display_name":"Set (abstract data type)","score":0.1810545027256012},{"id":"https://openalex.org/keywords/automata-theory","display_name":"Automata theory","score":0.15908774733543396},{"id":"https://openalex.org/keywords/nondeterministic-finite-automaton","display_name":"Nondeterministic finite automaton","score":0.07400104403495789}],"concepts":[{"id":"https://openalex.org/C77944639","wikidata":"https://www.wikidata.org/wiki/Q751443","display_name":"Pushdown automaton","level":3,"score":0.6944979429244995},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.6753542423248291},{"id":"https://openalex.org/C115988155","wikidata":"https://www.wikidata.org/wiki/Q3262192","display_name":"Decision problem","level":2,"score":0.5835016965866089},{"id":"https://openalex.org/C112505250","wikidata":"https://www.wikidata.org/wiki/Q787116","display_name":"Automaton","level":2,"score":0.5755087733268738},{"id":"https://openalex.org/C80444323","wikidata":"https://www.wikidata.org/wiki/Q2878974","display_name":"Theoretical computer science","level":1,"score":0.4417426288127899},{"id":"https://openalex.org/C2776760102","wikidata":"https://www.wikidata.org/wiki/Q5139990","display_name":"Code (set theory)","level":3,"score":0.4350894093513489},{"id":"https://openalex.org/C74919329","wikidata":"https://www.wikidata.org/wiki/Q378713","display_name":"Deterministic pushdown automaton","level":5,"score":0.41728007793426514},{"id":"https://openalex.org/C11413529","wikidata":"https://www.wikidata.org/wiki/Q8366","display_name":"Algorithm","level":1,"score":0.33470413088798523},{"id":"https://openalex.org/C199360897","wikidata":"https://www.wikidata.org/wiki/Q9143","display_name":"Programming language","level":1,"score":0.24098455905914307},{"id":"https://openalex.org/C177264268","wikidata":"https://www.wikidata.org/wiki/Q1514741","display_name":"Set (abstract data type)","level":2,"score":0.1810545027256012},{"id":"https://openalex.org/C116248031","wikidata":"https://www.wikidata.org/wiki/Q214526","display_name":"Automata theory","level":3,"score":0.15908774733543396},{"id":"https://openalex.org/C158008952","wikidata":"https://www.wikidata.org/wiki/Q617295","display_name":"Nondeterministic finite automaton","level":4,"score":0.07400104403495789}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1016/s0022-0000(76)80026-8","is_oa":false,"landing_page_url":"https://doi.org/10.1016/s0022-0000(76)80026-8","pdf_url":null,"source":{"id":"https://openalex.org/S141020589","display_name":"Journal of Computer and System Sciences","issn_l":"0022-0000","issn":["0022-0000","1090-2724"],"is_oa":false,"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":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Journal of Computer and System Sciences","raw_type":"journal-article"}],"best_oa_location":null,"sustainable_development_goals":[{"score":0.8199999928474426,"display_name":"Peace, Justice and strong institutions","id":"https://metadata.un.org/sdg/16"}],"awards":[],"funders":[],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":17,"referenced_works":["https://openalex.org/W1582408114","https://openalex.org/W1817451992","https://openalex.org/W1981472941","https://openalex.org/W1985604029","https://openalex.org/W1989780614","https://openalex.org/W1994385456","https://openalex.org/W2032543301","https://openalex.org/W2089107726","https://openalex.org/W2106001218","https://openalex.org/W2116976042","https://openalex.org/W2148224873","https://openalex.org/W2157390113","https://openalex.org/W2158448273","https://openalex.org/W4237168914","https://openalex.org/W6646823016","https://openalex.org/W6647911640","https://openalex.org/W6672861001"],"related_works":["https://openalex.org/W2039777175","https://openalex.org/W2522490152","https://openalex.org/W1511257926","https://openalex.org/W3196258201","https://openalex.org/W3133052492","https://openalex.org/W1602383402","https://openalex.org/W2053341755","https://openalex.org/W2049492436","https://openalex.org/W1584306444","https://openalex.org/W1562818191"],"abstract_inverted_index":null,"counts_by_year":[],"updated_date":"2026-03-10T14:07:55.174380","created_date":"2025-10-10T00:00:00"}
