{"id":"https://openalex.org/W2015004207","doi":"https://doi.org/10.1007/s10485-013-9345-4","title":"Notes on Exact Meets and Joins","display_name":"Notes on Exact Meets and Joins","publication_year":2013,"publication_date":"2013-11-29","ids":{"openalex":"https://openalex.org/W2015004207","doi":"https://doi.org/10.1007/s10485-013-9345-4","mag":"2015004207"},"language":"en","primary_location":{"id":"doi:10.1007/s10485-013-9345-4","is_oa":false,"landing_page_url":"https://doi.org/10.1007/s10485-013-9345-4","pdf_url":null,"source":{"id":"https://openalex.org/S148906134","display_name":"Applied Categorical Structures","issn_l":"0927-2852","issn":["0927-2852","1572-9095"],"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":"Applied Categorical Structures","raw_type":"journal-article"},"type":"article","indexed_in":["crossref"],"open_access":{"is_oa":true,"oa_status":"green","oa_url":"https://hdl.handle.net/10316/43787","any_repository_has_fulltext":true},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5029128543","display_name":"Richard N. Ball","orcid":"https://orcid.org/0000-0003-3613-0846"},"institutions":[{"id":"https://openalex.org/I131651094","display_name":"University of Denver","ror":"https://ror.org/04w7skc03","country_code":"US","type":"education","lineage":["https://openalex.org/I131651094"]}],"countries":["US"],"is_corresponding":true,"raw_author_name":"Richard N. Ball","raw_affiliation_strings":["Department of Mathematics, University of Denver, Denver, CO, 80112, USA","University of Denver, "],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Mathematics, University of Denver, Denver, CO, 80112, USA","institution_ids":["https://openalex.org/I131651094"]},{"raw_affiliation_string":"University of Denver, ","institution_ids":[]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5039338120","display_name":"Jorge Picado","orcid":"https://orcid.org/0000-0001-7837-1221"},"institutions":[{"id":"https://openalex.org/I76903346","display_name":"University of Coimbra","ror":"https://ror.org/04z8k9a98","country_code":"PT","type":"education","lineage":["https://openalex.org/I76903346"]}],"countries":["PT"],"is_corresponding":false,"raw_author_name":"Jorge Picado","raw_affiliation_strings":["CMUC, Department of Mathematics, University of Coimbra, 3001-501, Coimbra, Portugal","University of Coimbra#TAB#"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"CMUC, Department of Mathematics, University of Coimbra, 3001-501, Coimbra, Portugal","institution_ids":["https://openalex.org/I76903346"]},{"raw_affiliation_string":"University of Coimbra#TAB#","institution_ids":["https://openalex.org/I76903346"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5061070859","display_name":"Ale\u0161 Pultr","orcid":"https://orcid.org/0000-0002-9308-3700"},"institutions":[{"id":"https://openalex.org/I21250087","display_name":"Charles University","ror":"https://ror.org/024d6js02","country_code":"CZ","type":"education","lineage":["https://openalex.org/I21250087"]}],"countries":["CZ"],"is_corresponding":false,"raw_author_name":"Ale\u0161 Pultr","raw_affiliation_strings":["Department of Applied Mathematics and ITI, MFF, Charles University, Malostransk\u00e9 n\u00e1m 24, 75013, Praha 1, Czech Republic","Charles University,"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Applied Mathematics and ITI, MFF, Charles University, Malostransk\u00e9 n\u00e1m 24, 75013, Praha 1, Czech Republic","institution_ids":["https://openalex.org/I21250087"]},{"raw_affiliation_string":"Charles University,","institution_ids":["https://openalex.org/I21250087"]}]}],"institutions":[],"countries_distinct_count":3,"institutions_distinct_count":3,"corresponding_author_ids":["https://openalex.org/A5029128543"],"corresponding_institution_ids":["https://openalex.org/I131651094"],"apc_list":{"value":2390,"currency":"EUR","value_usd":2990},"apc_paid":null,"fwci":1.7634,"has_fulltext":false,"cited_by_count":15,"citation_normalized_percentile":{"value":0.81889149,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":90,"max":98},"biblio":{"volume":"22","issue":"5-6","first_page":"699","last_page":"714"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T11703","display_name":"Rings, Modules, and Algebras","score":0.9948999881744385,"subfield":{"id":"https://openalex.org/subfields/2602","display_name":"Algebra and Number Theory"},"field":{"id":"https://openalex.org/fields/26","display_name":"Mathematics"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},"topics":[{"id":"https://openalex.org/T11703","display_name":"Rings, Modules, and Algebras","score":0.9948999881744385,"subfield":{"id":"https://openalex.org/subfields/2602","display_name":"Algebra and Number Theory"},"field":{"id":"https://openalex.org/fields/26","display_name":"Mathematics"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10896","display_name":"Homotopy and Cohomology in Algebraic Topology","score":0.9677000045776367,"subfield":{"id":"https://openalex.org/subfields/2610","display_name":"Mathematical Physics"},"field":{"id":"https://openalex.org/fields/26","display_name":"Mathematics"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T11671","display_name":"Fuzzy and Soft Set Theory","score":0.9610000252723694,"subfield":{"id":"https://openalex.org/subfields/1803","display_name":"Management Science and Operations Research"},"field":{"id":"https://openalex.org/fields/18","display_name":"Decision Sciences"},"domain":{"id":"https://openalex.org/domains/2","display_name":"Social Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/joins","display_name":"Joins","score":0.9293387532234192},{"id":"https://openalex.org/keywords/homomorphism","display_name":"Homomorphism","score":0.7074234485626221},{"id":"https://openalex.org/keywords/property","display_name":"Property (philosophy)","score":0.5396952033042908},{"id":"https://openalex.org/keywords/infimum-and-supremum","display_name":"Infimum and supremum","score":0.5384120941162109},{"id":"https://openalex.org/keywords/theory-of-computation","display_name":"Theory of computation","score":0.5201131105422974},{"id":"https://openalex.org/keywords/lattice","display_name":"Lattice (music)","score":0.4971621334552765},{"id":"https://openalex.org/keywords/phenomenon","display_name":"Phenomenon","score":0.49184274673461914},{"id":"https://openalex.org/keywords/frame","display_name":"Frame (networking)","score":0.4698205292224884},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.4375026524066925},{"id":"https://openalex.org/keywords/mathematics","display_name":"Mathematics","score":0.43632227182388306},{"id":"https://openalex.org/keywords/pure-mathematics","display_name":"Pure mathematics","score":0.30784183740615845},{"id":"https://openalex.org/keywords/discrete-mathematics","display_name":"Discrete mathematics","score":0.2938461899757385},{"id":"https://openalex.org/keywords/algorithm","display_name":"Algorithm","score":0.15813425183296204},{"id":"https://openalex.org/keywords/physics","display_name":"Physics","score":0.10802066326141357},{"id":"https://openalex.org/keywords/programming-language","display_name":"Programming language","score":0.06865468621253967},{"id":"https://openalex.org/keywords/epistemology","display_name":"Epistemology","score":0.06378522515296936}],"concepts":[{"id":"https://openalex.org/C2778692605","wikidata":"https://www.wikidata.org/wiki/Q4041866","display_name":"Joins","level":2,"score":0.9293387532234192},{"id":"https://openalex.org/C4042151","wikidata":"https://www.wikidata.org/wiki/Q215111","display_name":"Homomorphism","level":2,"score":0.7074234485626221},{"id":"https://openalex.org/C189950617","wikidata":"https://www.wikidata.org/wiki/Q937228","display_name":"Property (philosophy)","level":2,"score":0.5396952033042908},{"id":"https://openalex.org/C95611797","wikidata":"https://www.wikidata.org/wiki/Q17502105","display_name":"Infimum and supremum","level":2,"score":0.5384120941162109},{"id":"https://openalex.org/C24858836","wikidata":"https://www.wikidata.org/wiki/Q844718","display_name":"Theory of computation","level":2,"score":0.5201131105422974},{"id":"https://openalex.org/C2781204021","wikidata":"https://www.wikidata.org/wiki/Q6497091","display_name":"Lattice (music)","level":2,"score":0.4971621334552765},{"id":"https://openalex.org/C50335755","wikidata":"https://www.wikidata.org/wiki/Q483247","display_name":"Phenomenon","level":2,"score":0.49184274673461914},{"id":"https://openalex.org/C126042441","wikidata":"https://www.wikidata.org/wiki/Q1324888","display_name":"Frame (networking)","level":2,"score":0.4698205292224884},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.4375026524066925},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.43632227182388306},{"id":"https://openalex.org/C202444582","wikidata":"https://www.wikidata.org/wiki/Q837863","display_name":"Pure mathematics","level":1,"score":0.30784183740615845},{"id":"https://openalex.org/C118615104","wikidata":"https://www.wikidata.org/wiki/Q121416","display_name":"Discrete mathematics","level":1,"score":0.2938461899757385},{"id":"https://openalex.org/C11413529","wikidata":"https://www.wikidata.org/wiki/Q8366","display_name":"Algorithm","level":1,"score":0.15813425183296204},{"id":"https://openalex.org/C121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","level":0,"score":0.10802066326141357},{"id":"https://openalex.org/C199360897","wikidata":"https://www.wikidata.org/wiki/Q9143","display_name":"Programming language","level":1,"score":0.06865468621253967},{"id":"https://openalex.org/C111472728","wikidata":"https://www.wikidata.org/wiki/Q9471","display_name":"Epistemology","level":1,"score":0.06378522515296936},{"id":"https://openalex.org/C76155785","wikidata":"https://www.wikidata.org/wiki/Q418","display_name":"Telecommunications","level":1,"score":0.0},{"id":"https://openalex.org/C138885662","wikidata":"https://www.wikidata.org/wiki/Q5891","display_name":"Philosophy","level":0,"score":0.0},{"id":"https://openalex.org/C62520636","wikidata":"https://www.wikidata.org/wiki/Q944","display_name":"Quantum mechanics","level":1,"score":0.0},{"id":"https://openalex.org/C24890656","wikidata":"https://www.wikidata.org/wiki/Q82811","display_name":"Acoustics","level":1,"score":0.0}],"mesh":[],"locations_count":3,"locations":[{"id":"doi:10.1007/s10485-013-9345-4","is_oa":false,"landing_page_url":"https://doi.org/10.1007/s10485-013-9345-4","pdf_url":null,"source":{"id":"https://openalex.org/S148906134","display_name":"Applied Categorical Structures","issn_l":"0927-2852","issn":["0927-2852","1572-9095"],"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":"Applied Categorical Structures","raw_type":"journal-article"},{"id":"pmh:oai:estudogeral.sib.uc.pt:10316/43787","is_oa":false,"landing_page_url":"http://hdl.handle.net/10316/43787","pdf_url":null,"source":{"id":"https://openalex.org/S4306402070","display_name":"Estudo Geral (Universidad de Coimbra)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/I76903346","host_organization_name":"University of Coimbra","host_organization_lineage":["https://openalex.org/I76903346"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"","raw_type":"http://purl.org/coar/resource_type/c_6501"},{"id":"pmh:oai:estudogeral.uc.pt:10316/43787","is_oa":true,"landing_page_url":"https://hdl.handle.net/10316/43787","pdf_url":null,"source":{"id":"https://openalex.org/S7407055320","display_name":"Estudo Geral","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":null,"host_organization_name":null,"host_organization_lineage":[],"host_organization_lineage_names":[],"type":"repository"},"license":"other-oa","license_id":"https://openalex.org/licenses/other-oa","version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":null,"raw_type":"info:eu-repo/semantics/article"}],"best_oa_location":{"id":"pmh:oai:estudogeral.uc.pt:10316/43787","is_oa":true,"landing_page_url":"https://hdl.handle.net/10316/43787","pdf_url":null,"source":{"id":"https://openalex.org/S7407055320","display_name":"Estudo Geral","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":null,"host_organization_name":null,"host_organization_lineage":[],"host_organization_lineage_names":[],"type":"repository"},"license":"other-oa","license_id":"https://openalex.org/licenses/other-oa","version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":null,"raw_type":"info:eu-repo/semantics/article"},"sustainable_development_goals":[],"awards":[],"funders":[],"has_content":{"grobid_xml":false,"pdf":false},"content_urls":null,"referenced_works_count":18,"referenced_works":["https://openalex.org/W577268773","https://openalex.org/W1602062035","https://openalex.org/W1825194660","https://openalex.org/W1964914154","https://openalex.org/W2063053726","https://openalex.org/W2063278822","https://openalex.org/W2072782595","https://openalex.org/W2073315599","https://openalex.org/W2080540965","https://openalex.org/W2082150991","https://openalex.org/W2086427388","https://openalex.org/W2087065045","https://openalex.org/W2487483580","https://openalex.org/W3158054806","https://openalex.org/W4211213234","https://openalex.org/W4212842566","https://openalex.org/W4285719527","https://openalex.org/W6821006643"],"related_works":["https://openalex.org/W2088925915","https://openalex.org/W2382891957","https://openalex.org/W2393491644","https://openalex.org/W2067184662","https://openalex.org/W2953175190","https://openalex.org/W4288318511","https://openalex.org/W2257286100","https://openalex.org/W2099602951","https://openalex.org/W2784344684","https://openalex.org/W1999983488"],"abstract_inverted_index":null,"counts_by_year":[{"year":2026,"cited_by_count":1},{"year":2025,"cited_by_count":3},{"year":2024,"cited_by_count":1},{"year":2023,"cited_by_count":1},{"year":2021,"cited_by_count":2},{"year":2020,"cited_by_count":2},{"year":2019,"cited_by_count":1},{"year":2017,"cited_by_count":1},{"year":2016,"cited_by_count":1},{"year":2014,"cited_by_count":2}],"updated_date":"2026-05-04T08:30:34.212998","created_date":"2025-10-10T00:00:00"}