{"id":"https://openalex.org/W1591852465","doi":"https://doi.org/10.1007/3-540-46011-x_21","title":"Level 5/2 of the Straubing-Th\u00e9rien Hierarchy for Two-Letter Alphabets","display_name":"Level 5/2 of the Straubing-Th\u00e9rien Hierarchy for Two-Letter Alphabets","publication_year":2002,"publication_date":"2002-01-01","ids":{"openalex":"https://openalex.org/W1591852465","doi":"https://doi.org/10.1007/3-540-46011-x_21","mag":"1591852465"},"language":"en","primary_location":{"id":"doi:10.1007/3-540-46011-x_21","is_oa":false,"landing_page_url":"https://doi.org/10.1007/3-540-46011-x_21","pdf_url":null,"source":{"id":"https://openalex.org/S106296714","display_name":"Lecture notes in computer science","issn_l":"0302-9743","issn":["0302-9743","1611-3349"],"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":"book series"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Lecture Notes in Computer Science","raw_type":"book-chapter"},"type":"conference-paper","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/A5111915074","display_name":"Christian Gla\u00dfer","orcid":null},"institutions":[{"id":"https://openalex.org/I25974101","display_name":"University of W\u00fcrzburg","ror":"https://ror.org/00fbnyb24","country_code":"DE","type":"education","lineage":["https://openalex.org/I25974101"]}],"countries":["DE"],"is_corresponding":false,"raw_author_name":"Christian Gla\u00dfer","raw_affiliation_strings":["Theoretische Informatik, Universit\u00e4tW\u00fcrzburg, 97074, Am Hubland, W\u00fcrzburg, Germany"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Theoretische Informatik, Universit\u00e4tW\u00fcrzburg, 97074, Am Hubland, W\u00fcrzburg, Germany","institution_ids":["https://openalex.org/I25974101"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5020319042","display_name":"Heinz Schmitz","orcid":"https://orcid.org/0000-0002-3371-6983"},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"Heinz Schmitz","raw_affiliation_strings":["sd&m AG, software design & management, Thomas-Dehler-Str. 27, 81737, M\u00fcnchen, Germany"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"sd&m AG, software design & management, Thomas-Dehler-Str. 27, 81737, M\u00fcnchen, Germany","institution_ids":[]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":1,"corresponding_author_ids":[],"corresponding_institution_ids":[],"apc_list":{"value":5000,"currency":"EUR","value_usd":5392},"apc_paid":null,"fwci":0.2568,"has_fulltext":false,"cited_by_count":5,"citation_normalized_percentile":{"value":0.39753434,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":90,"max":94},"biblio":{"volume":null,"issue":null,"first_page":"251","last_page":"261"},"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/T11727","display_name":"Advanced Algebra and Logic","score":0.9973999857902527,"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/T10948","display_name":"Advanced Combinatorial Mathematics","score":0.9939000010490417,"subfield":{"id":"https://openalex.org/subfields/2607","display_name":"Discrete Mathematics and Combinatorics"},"field":{"id":"https://openalex.org/fields/26","display_name":"Mathematics"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.8012069463729858},{"id":"https://openalex.org/keywords/hierarchy","display_name":"Hierarchy","score":0.5484975576400757},{"id":"https://openalex.org/keywords/theoretical-computer-science","display_name":"Theoretical computer science","score":0.3310650587081909},{"id":"https://openalex.org/keywords/political-science","display_name":"Political science","score":0.04542168974876404},{"id":"https://openalex.org/keywords/law","display_name":"Law","score":0.04104307293891907}],"concepts":[{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.8012069463729858},{"id":"https://openalex.org/C31170391","wikidata":"https://www.wikidata.org/wiki/Q188619","display_name":"Hierarchy","level":2,"score":0.5484975576400757},{"id":"https://openalex.org/C80444323","wikidata":"https://www.wikidata.org/wiki/Q2878974","display_name":"Theoretical computer science","level":1,"score":0.3310650587081909},{"id":"https://openalex.org/C17744445","wikidata":"https://www.wikidata.org/wiki/Q36442","display_name":"Political science","level":0,"score":0.04542168974876404},{"id":"https://openalex.org/C199539241","wikidata":"https://www.wikidata.org/wiki/Q7748","display_name":"Law","level":1,"score":0.04104307293891907}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1007/3-540-46011-x_21","is_oa":false,"landing_page_url":"https://doi.org/10.1007/3-540-46011-x_21","pdf_url":null,"source":{"id":"https://openalex.org/S106296714","display_name":"Lecture notes in computer science","issn_l":"0302-9743","issn":["0302-9743","1611-3349"],"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":"book series"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Lecture Notes in Computer Science","raw_type":"book-chapter"}],"best_oa_location":null,"sustainable_development_goals":[{"display_name":"Quality Education","score":0.5299999713897705,"id":"https://metadata.un.org/sdg/4"}],"awards":[],"funders":[],"has_content":{"grobid_xml":false,"pdf":false},"content_urls":null,"referenced_works_count":24,"referenced_works":["https://openalex.org/W78316004","https://openalex.org/W90483773","https://openalex.org/W137331784","https://openalex.org/W1494501847","https://openalex.org/W1524859865","https://openalex.org/W1560939112","https://openalex.org/W1596626150","https://openalex.org/W1816620374","https://openalex.org/W2013085432","https://openalex.org/W2019522567","https://openalex.org/W2020558489","https://openalex.org/W2039934838","https://openalex.org/W2042177219","https://openalex.org/W2047822387","https://openalex.org/W2065599266","https://openalex.org/W2076872551","https://openalex.org/W2078174437","https://openalex.org/W2116250539","https://openalex.org/W2222913098","https://openalex.org/W2912226968","https://openalex.org/W4210981569","https://openalex.org/W4256691759","https://openalex.org/W4285719527","https://openalex.org/W6617347132"],"related_works":["https://openalex.org/W2748952813","https://openalex.org/W2365264209","https://openalex.org/W2390279801","https://openalex.org/W2358668433","https://openalex.org/W2509431957","https://openalex.org/W2376932109","https://openalex.org/W2001405890","https://openalex.org/W2026999166","https://openalex.org/W2382290278","https://openalex.org/W2350741829"],"abstract_inverted_index":null,"counts_by_year":[{"year":2016,"cited_by_count":1}],"updated_date":"2026-07-29T14:22:42.915294","created_date":"2025-10-10T00:00:00"}
