{"id":"https://openalex.org/W4410525531","doi":"https://doi.org/10.1142/s0129054125410060","title":"Operational Complexity in Subregular Classes","display_name":"Operational Complexity in Subregular Classes","publication_year":2025,"publication_date":"2025-05-20","ids":{"openalex":"https://openalex.org/W4410525531","doi":"https://doi.org/10.1142/s0129054125410060"},"language":"en","primary_location":{"id":"doi:10.1142/s0129054125410060","is_oa":false,"landing_page_url":"https://doi.org/10.1142/s0129054125410060","pdf_url":null,"source":{"id":"https://openalex.org/S68047077","display_name":"International Journal of Foundations of Computer Science","issn_l":"0129-0541","issn":["0129-0541","1793-6373"],"is_oa":false,"is_in_doaj":false,"is_core":true,"host_organization":"https://openalex.org/P4310319815","host_organization_name":"World Scientific","host_organization_lineage":["https://openalex.org/P4310319815"],"host_organization_lineage_names":["World Scientific"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"International Journal of Foundations of Computer Science","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/A5117608966","display_name":"Michaela Bobeni\u010dov\u00e1","orcid":"https://orcid.org/0009-0007-6904-5054"},"institutions":[{"id":"https://openalex.org/I204881574","display_name":"University of Pavol Jozef \u0160af\u00e1rik","ror":"https://ror.org/039965637","country_code":"SK","type":"education","lineage":["https://openalex.org/I204881574"]},{"id":"https://openalex.org/I4210105280","display_name":"Institute of Mathematics","ror":"https://ror.org/00vsg3p53","country_code":"BY","type":"facility","lineage":["https://openalex.org/I151823869","https://openalex.org/I4210105280","https://openalex.org/I4210116091"]}],"countries":["BY","SK"],"is_corresponding":true,"raw_author_name":"Michaela Bobeni\u010dov\u00e1","raw_affiliation_strings":["Institute of Computer Science, P.J.\u00a0\u0160af\u00e1rik University, Jesenn\u00e1 5, 040 01 Ko\u0161ice, Slovakia","Institute of Computer Science, P.J. \u0160af\u00e1rik University, Jesenn\u00e1 5, 040 01 Ko\u0161ice, Slovakia"],"raw_orcid":"https://orcid.org/0009-0007-6904-5054","affiliations":[{"raw_affiliation_string":"Institute of Computer Science, P.J.\u00a0\u0160af\u00e1rik University, Jesenn\u00e1 5, 040 01 Ko\u0161ice, Slovakia","institution_ids":["https://openalex.org/I4210105280","https://openalex.org/I204881574"]},{"raw_affiliation_string":"Institute of Computer Science, P.J. \u0160af\u00e1rik University, Jesenn\u00e1 5, 040 01 Ko\u0161ice, Slovakia","institution_ids":["https://openalex.org/I204881574"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5028435745","display_name":"Michal Hospod\u00e1r","orcid":"https://orcid.org/0000-0002-1752-544X"},"institutions":[{"id":"https://openalex.org/I207624831","display_name":"Slovak Academy of Sciences","ror":"https://ror.org/03h7qq074","country_code":"SK","type":"government","lineage":["https://openalex.org/I207624831"]},{"id":"https://openalex.org/I4210120676","display_name":"Mathematical Institute of the Slovak Academy of Sciences","ror":"https://ror.org/02fhy7464","country_code":"SK","type":"facility","lineage":["https://openalex.org/I207624831","https://openalex.org/I4210120676"]}],"countries":["SK"],"is_corresponding":false,"raw_author_name":"Michal Hospod\u00e1r","raw_affiliation_strings":["Mathematical Institute, Slovak Academy of Sciences, Gre\u0161\u00e1kova 6, 040 01 Ko\u0161ice, Slovakia"],"raw_orcid":"https://orcid.org/0000-0002-1752-544X","affiliations":[{"raw_affiliation_string":"Mathematical Institute, Slovak Academy of Sciences, Gre\u0161\u00e1kova 6, 040 01 Ko\u0161ice, Slovakia","institution_ids":["https://openalex.org/I207624831","https://openalex.org/I4210120676"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5012840795","display_name":"Galina Jir\u00e1skov\u00e1","orcid":"https://orcid.org/0000-0001-9817-8197"},"institutions":[{"id":"https://openalex.org/I207624831","display_name":"Slovak Academy of Sciences","ror":"https://ror.org/03h7qq074","country_code":"SK","type":"government","lineage":["https://openalex.org/I207624831"]},{"id":"https://openalex.org/I4210120676","display_name":"Mathematical Institute of the Slovak Academy of Sciences","ror":"https://ror.org/02fhy7464","country_code":"SK","type":"facility","lineage":["https://openalex.org/I207624831","https://openalex.org/I4210120676"]}],"countries":["SK"],"is_corresponding":false,"raw_author_name":"Galina Jir\u00e1skov\u00e1","raw_affiliation_strings":["Mathematical Institute, Slovak Academy of Sciences, Gre\u0161\u00e1kova 6, 040 01 Ko\u0161ice, Slovakia"],"raw_orcid":"https://orcid.org/0000-0001-9817-8197","affiliations":[{"raw_affiliation_string":"Mathematical Institute, Slovak Academy of Sciences, Gre\u0161\u00e1kova 6, 040 01 Ko\u0161ice, Slovakia","institution_ids":["https://openalex.org/I207624831","https://openalex.org/I4210120676"]}]}],"institutions":[],"countries_distinct_count":2,"institutions_distinct_count":3,"corresponding_author_ids":["https://openalex.org/A5117608966"],"corresponding_institution_ids":["https://openalex.org/I204881574","https://openalex.org/I4210105280"],"apc_list":null,"apc_paid":null,"fwci":1.3257,"has_fulltext":false,"cited_by_count":1,"citation_normalized_percentile":{"value":0.81960484,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":91,"max":95},"biblio":{"volume":"37","issue":"01","first_page":"137","last_page":"165"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T12002","display_name":"Computability, Logic, AI Algorithms","score":0.9247000217437744,"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/T12002","display_name":"Computability, Logic, AI Algorithms","score":0.9247000217437744,"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/mathematics","display_name":"Mathematics","score":0.47032225131988525},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.45959290862083435},{"id":"https://openalex.org/keywords/theoretical-computer-science","display_name":"Theoretical computer science","score":0.3935409188270569},{"id":"https://openalex.org/keywords/discrete-mathematics","display_name":"Discrete mathematics","score":0.33553221821784973}],"concepts":[{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.47032225131988525},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.45959290862083435},{"id":"https://openalex.org/C80444323","wikidata":"https://www.wikidata.org/wiki/Q2878974","display_name":"Theoretical computer science","level":1,"score":0.3935409188270569},{"id":"https://openalex.org/C118615104","wikidata":"https://www.wikidata.org/wiki/Q121416","display_name":"Discrete mathematics","level":1,"score":0.33553221821784973}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1142/s0129054125410060","is_oa":false,"landing_page_url":"https://doi.org/10.1142/s0129054125410060","pdf_url":null,"source":{"id":"https://openalex.org/S68047077","display_name":"International Journal of Foundations of Computer Science","issn_l":"0129-0541","issn":["0129-0541","1793-6373"],"is_oa":false,"is_in_doaj":false,"is_core":true,"host_organization":"https://openalex.org/P4310319815","host_organization_name":"World Scientific","host_organization_lineage":["https://openalex.org/P4310319815"],"host_organization_lineage_names":["World Scientific"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"International Journal of Foundations of Computer Science","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":20,"referenced_works":["https://openalex.org/W136331652","https://openalex.org/W1501444314","https://openalex.org/W1533036729","https://openalex.org/W1595331547","https://openalex.org/W1988560957","https://openalex.org/W2006629323","https://openalex.org/W2010487137","https://openalex.org/W2018937876","https://openalex.org/W2024077433","https://openalex.org/W2063230375","https://openalex.org/W2088953089","https://openalex.org/W2106875872","https://openalex.org/W2109036808","https://openalex.org/W2116250539","https://openalex.org/W2128263261","https://openalex.org/W2285315733","https://openalex.org/W2755484740","https://openalex.org/W2913032954","https://openalex.org/W4382051072","https://openalex.org/W4384817627"],"related_works":["https://openalex.org/W2899084033","https://openalex.org/W2748952813","https://openalex.org/W4391375266","https://openalex.org/W1979597421","https://openalex.org/W2007980826","https://openalex.org/W2061531152","https://openalex.org/W3002753104","https://openalex.org/W2077600819","https://openalex.org/W2142036596","https://openalex.org/W2072657027"],"abstract_inverted_index":{"We":[0],"study":[1],"the":[2,9,30,76,79,87,91,99,102,128],"state":[3,80],"complexity":[4,52,81,103],"of":[5,11,32,53,75,82,104,112],"regular":[6,92,129],"operations":[7,31,55,84],"on":[8,56,66,106,117,150],"classes":[10],"combinational,":[12],"singleton,":[13],"finitely":[14,107,151],"generated":[15,108,152],"left":[16,109,153],"ideal,":[17],"symmetric":[18,118],"definite,":[19],"star,":[20,39],"comet,":[21,23],"two-sided":[22],"ordered,":[24],"star-free,":[25],"and":[26,40,65,111,114,120,155],"power-separating":[27],"languages.":[28,157],"For":[29],"union,":[33],"intersection,":[34],"concatenation,":[35],"cut,":[36],"positive":[37,115],"closure,":[38],"reversal,":[41],"we":[42],"get":[43],"tight":[44],"upper":[45],"bounds":[46],"for":[47,146,148],"all":[48,54],"considered":[49,83],"classes.":[50],"The":[51],"combinational":[57],"languages":[58,68,122],"is":[59,85,123],"given":[60],"by":[61,69],"a":[62,70,137,142],"constant":[63],"function,":[64],"singleton":[67],"linear":[71],"function.":[72],"In":[73],"most":[74],"remaining":[77],"cases,":[78],"either":[86],"same":[88],"as":[89],"in":[90,127],"case,":[93],"or":[94],"just":[95],"slightly":[96],"smaller.":[97],"On":[98],"other":[100],"hand,":[101],"concatenation":[105],"ideals":[110,154],"star":[113,121],"closure":[116],"definite":[119],"much":[124],"smaller":[125],"than":[126],"case.":[130],"All":[131],"our":[132],"witnesses":[133,147],"are":[134],"described":[135],"over":[136],"small":[138],"fixed":[139],"alphabet,":[140],"mostly":[141],"binary":[143],"one,":[144],"except":[145],"reversal":[149],"ordered":[156]},"counts_by_year":[{"year":2025,"cited_by_count":1}],"updated_date":"2026-03-27T05:58:40.876381","created_date":"2025-10-10T00:00:00"}
