{"id":"https://openalex.org/W2019570031","doi":"https://doi.org/10.1007/bf01786988","title":"On reducing the number of states in a PDA","display_name":"On reducing the number of states in a PDA","publication_year":1981,"publication_date":"1981-12-01","ids":{"openalex":"https://openalex.org/W2019570031","doi":"https://doi.org/10.1007/bf01786988","mag":"2019570031"},"language":"en","primary_location":{"id":"doi:10.1007/bf01786988","is_oa":false,"landing_page_url":"https://doi.org/10.1007/bf01786988","pdf_url":null,"source":{"id":"https://openalex.org/S4210177266","display_name":"Theory of Computing Systems","issn_l":"1432-4350","issn":["1432-4350","1433-0490"],"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":"Mathematical Systems Theory","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/A5087046267","display_name":"Jonathan Goldstine","orcid":null},"institutions":[{"id":"https://openalex.org/I130769515","display_name":"Pennsylvania State University","ror":"https://ror.org/04p491231","country_code":"US","type":"education","lineage":["https://openalex.org/I130769515"]}],"countries":["US"],"is_corresponding":true,"raw_author_name":"Jonathan Goldstine","raw_affiliation_strings":["Computer Science Department, The Pennsylvania State University, University Park, Pennsylvania, USA","Computer Science Department The Pennsylvania State University, USA"],"affiliations":[{"raw_affiliation_string":"Computer Science Department, The Pennsylvania State University, University Park, Pennsylvania, USA","institution_ids":["https://openalex.org/I130769515"]},{"raw_affiliation_string":"Computer Science Department The Pennsylvania State University, USA","institution_ids":["https://openalex.org/I130769515"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5091134790","display_name":"John K. Price","orcid":null},"institutions":[{"id":"https://openalex.org/I130769515","display_name":"Pennsylvania State University","ror":"https://ror.org/04p491231","country_code":"US","type":"education","lineage":["https://openalex.org/I130769515"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"John K. Price","raw_affiliation_strings":["Computer Science Department, The Pennsylvania State University, University Park, Pennsylvania, USA","Computer Science Department The Pennsylvania State University, USA"],"affiliations":[{"raw_affiliation_string":"Computer Science Department, The Pennsylvania State University, University Park, Pennsylvania, USA","institution_ids":["https://openalex.org/I130769515"]},{"raw_affiliation_string":"Computer Science Department The Pennsylvania State University, USA","institution_ids":["https://openalex.org/I130769515"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5031669663","display_name":"Detlef Wotschke","orcid":null},"institutions":[{"id":"https://openalex.org/I114090438","display_name":"Goethe University Frankfurt","ror":"https://ror.org/04cvxnb49","country_code":"DE","type":"education","lineage":["https://openalex.org/I114090438"]}],"countries":["DE"],"is_corresponding":false,"raw_author_name":"Detlef Wotschke","raw_affiliation_strings":["Fachbereich Informatik, Johann Wolfgang Goethe-Universit\u00e4t, Frankfurt, West Germany"],"affiliations":[{"raw_affiliation_string":"Fachbereich Informatik, Johann Wolfgang Goethe-Universit\u00e4t, Frankfurt, West Germany","institution_ids":["https://openalex.org/I114090438"]}]}],"institutions":[],"countries_distinct_count":2,"institutions_distinct_count":3,"corresponding_author_ids":["https://openalex.org/A5087046267"],"corresponding_institution_ids":["https://openalex.org/I130769515"],"apc_list":{"value":2290,"currency":"EUR","value_usd":2890},"apc_paid":null,"fwci":0.0,"has_fulltext":false,"cited_by_count":11,"citation_normalized_percentile":{"value":0.16064598,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":89,"max":96},"biblio":{"volume":"15","issue":"1","first_page":"315","last_page":"321"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T11567","display_name":"semigroups and automata theory","score":0.9990000128746033,"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":0.9990000128746033,"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/T12072","display_name":"Machine Learning and Algorithms","score":0.9921000003814697,"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/T12029","display_name":"DNA and Biological Computing","score":0.9915000200271606,"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"}}],"keywords":[{"id":"https://openalex.org/keywords/nuclear-engineering","display_name":"Nuclear engineering","score":0.3689360022544861},{"id":"https://openalex.org/keywords/environmental-science","display_name":"Environmental science","score":0.34541141986846924},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.334553599357605},{"id":"https://openalex.org/keywords/engineering","display_name":"Engineering","score":0.22079810500144958}],"concepts":[{"id":"https://openalex.org/C116915560","wikidata":"https://www.wikidata.org/wiki/Q83504","display_name":"Nuclear engineering","level":1,"score":0.3689360022544861},{"id":"https://openalex.org/C39432304","wikidata":"https://www.wikidata.org/wiki/Q188847","display_name":"Environmental science","level":0,"score":0.34541141986846924},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.334553599357605},{"id":"https://openalex.org/C127413603","wikidata":"https://www.wikidata.org/wiki/Q11023","display_name":"Engineering","level":0,"score":0.22079810500144958}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1007/bf01786988","is_oa":false,"landing_page_url":"https://doi.org/10.1007/bf01786988","pdf_url":null,"source":{"id":"https://openalex.org/S4210177266","display_name":"Theory of Computing Systems","issn_l":"1432-4350","issn":["1432-4350","1433-0490"],"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":"Mathematical Systems Theory","raw_type":"journal-article"}],"best_oa_location":null,"sustainable_development_goals":[],"awards":[],"funders":[],"has_content":{"grobid_xml":false,"pdf":false},"content_urls":null,"referenced_works_count":17,"referenced_works":["https://openalex.org/W299519334","https://openalex.org/W421997344","https://openalex.org/W956032893","https://openalex.org/W1535681052","https://openalex.org/W1982581840","https://openalex.org/W2002089154","https://openalex.org/W2020570874","https://openalex.org/W2054801208","https://openalex.org/W2073763412","https://openalex.org/W2074593591","https://openalex.org/W2081994618","https://openalex.org/W2148224873","https://openalex.org/W2276792833","https://openalex.org/W2315905328","https://openalex.org/W3005278268","https://openalex.org/W4302339081","https://openalex.org/W6681518431"],"related_works":["https://openalex.org/W2748952813","https://openalex.org/W2390279801","https://openalex.org/W2358668433","https://openalex.org/W2376932109","https://openalex.org/W2001405890","https://openalex.org/W2382290278","https://openalex.org/W2478288626","https://openalex.org/W4391913857","https://openalex.org/W2350741829","https://openalex.org/W2530322880"],"abstract_inverted_index":null,"counts_by_year":[{"year":2025,"cited_by_count":1},{"year":2021,"cited_by_count":1},{"year":2020,"cited_by_count":2},{"year":2019,"cited_by_count":1},{"year":2017,"cited_by_count":1}],"updated_date":"2025-11-06T03:46:38.306776","created_date":"2025-10-10T00:00:00"}