{"id":"https://openalex.org/W2063593364","doi":"https://doi.org/10.1016/s0012-365x(99)00062-x","title":"On the existence of blocking 3-sets in designs","display_name":"On the existence of blocking 3-sets in designs","publication_year":1999,"publication_date":"1999-10-01","ids":{"openalex":"https://openalex.org/W2063593364","doi":"https://doi.org/10.1016/s0012-365x(99)00062-x","mag":"2063593364"},"language":"en","primary_location":{"id":"doi:10.1016/s0012-365x(99)00062-x","is_oa":false,"landing_page_url":"https://doi.org/10.1016/s0012-365x(99)00062-x","pdf_url":null,"source":{"id":"https://openalex.org/S18902827","display_name":"Discrete Mathematics","issn_l":"0012-365X","issn":["0012-365X","1872-681X"],"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":"Discrete Mathematics","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/A5032201026","display_name":"Luigia Berardi","orcid":null},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"Luigia Berardi","raw_affiliation_strings":["Dipartimento di Ingegneria Elettrica, I-67040, Monteluco di Roio (L'Aquila), Italy"],"affiliations":[{"raw_affiliation_string":"Dipartimento di Ingegneria Elettrica, I-67040, Monteluco di Roio (L'Aquila), Italy","institution_ids":[]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5043927080","display_name":"Fulvio Zuanni","orcid":null},"institutions":[],"countries":[],"is_corresponding":true,"raw_author_name":"Fulvio Zuanni","raw_affiliation_strings":["Dipartimento di Ingegneria Elettrica, I-67040, Monteluco di Roio (L'Aquila), Italy"],"affiliations":[{"raw_affiliation_string":"Dipartimento di Ingegneria Elettrica, I-67040, Monteluco di Roio (L'Aquila), Italy","institution_ids":[]}]}],"institutions":[],"countries_distinct_count":0,"institutions_distinct_count":2,"corresponding_author_ids":["https://openalex.org/A5043927080"],"corresponding_institution_ids":[],"apc_list":{"value":3000,"currency":"USD","value_usd":3000},"apc_paid":null,"fwci":0.0,"has_fulltext":false,"cited_by_count":2,"citation_normalized_percentile":{"value":0.1607565,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":null,"biblio":{"volume":"208-209","issue":null,"first_page":"61","last_page":"70"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T11797","display_name":"graph theory and CDMA systems","score":0.9998000264167786,"subfield":{"id":"https://openalex.org/subfields/2208","display_name":"Electrical and Electronic Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},"topics":[{"id":"https://openalex.org/T11797","display_name":"graph theory and CDMA systems","score":0.9998000264167786,"subfield":{"id":"https://openalex.org/subfields/2208","display_name":"Electrical and Electronic Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/hadamard-transform","display_name":"Hadamard transform","score":0.8965545892715454},{"id":"https://openalex.org/keywords/blocking","display_name":"Blocking (statistics)","score":0.86057049036026},{"id":"https://openalex.org/keywords/mathematics","display_name":"Mathematics","score":0.7813739776611328},{"id":"https://openalex.org/keywords/hadamard-matrix","display_name":"Hadamard matrix","score":0.7121868133544922},{"id":"https://openalex.org/keywords/combinatorics","display_name":"Combinatorics","score":0.6315476894378662},{"id":"https://openalex.org/keywords/block-design","display_name":"Block design","score":0.5895483493804932},{"id":"https://openalex.org/keywords/discrete-mathematics","display_name":"Discrete mathematics","score":0.5043352842330933},{"id":"https://openalex.org/keywords/set","display_name":"Set (abstract data type)","score":0.48762789368629456},{"id":"https://openalex.org/keywords/arithmetic","display_name":"Arithmetic","score":0.38198429346084595},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.19734957814216614},{"id":"https://openalex.org/keywords/statistics","display_name":"Statistics","score":0.0935584306716919},{"id":"https://openalex.org/keywords/mathematical-analysis","display_name":"Mathematical analysis","score":0.06700965762138367}],"concepts":[{"id":"https://openalex.org/C60292330","wikidata":"https://www.wikidata.org/wiki/Q1014065","display_name":"Hadamard transform","level":2,"score":0.8965545892715454},{"id":"https://openalex.org/C144745244","wikidata":"https://www.wikidata.org/wiki/Q4927286","display_name":"Blocking (statistics)","level":2,"score":0.86057049036026},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.7813739776611328},{"id":"https://openalex.org/C30463267","wikidata":"https://www.wikidata.org/wiki/Q1422682","display_name":"Hadamard matrix","level":3,"score":0.7121868133544922},{"id":"https://openalex.org/C114614502","wikidata":"https://www.wikidata.org/wiki/Q76592","display_name":"Combinatorics","level":1,"score":0.6315476894378662},{"id":"https://openalex.org/C689293","wikidata":"https://www.wikidata.org/wiki/Q751484","display_name":"Block design","level":2,"score":0.5895483493804932},{"id":"https://openalex.org/C118615104","wikidata":"https://www.wikidata.org/wiki/Q121416","display_name":"Discrete mathematics","level":1,"score":0.5043352842330933},{"id":"https://openalex.org/C177264268","wikidata":"https://www.wikidata.org/wiki/Q1514741","display_name":"Set (abstract data type)","level":2,"score":0.48762789368629456},{"id":"https://openalex.org/C94375191","wikidata":"https://www.wikidata.org/wiki/Q11205","display_name":"Arithmetic","level":1,"score":0.38198429346084595},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.19734957814216614},{"id":"https://openalex.org/C105795698","wikidata":"https://www.wikidata.org/wiki/Q12483","display_name":"Statistics","level":1,"score":0.0935584306716919},{"id":"https://openalex.org/C134306372","wikidata":"https://www.wikidata.org/wiki/Q7754","display_name":"Mathematical analysis","level":1,"score":0.06700965762138367},{"id":"https://openalex.org/C199360897","wikidata":"https://www.wikidata.org/wiki/Q9143","display_name":"Programming language","level":1,"score":0.0}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1016/s0012-365x(99)00062-x","is_oa":false,"landing_page_url":"https://doi.org/10.1016/s0012-365x(99)00062-x","pdf_url":null,"source":{"id":"https://openalex.org/S18902827","display_name":"Discrete Mathematics","issn_l":"0012-365X","issn":["0012-365X","1872-681X"],"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":"Discrete Mathematics","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":0,"referenced_works":[],"related_works":["https://openalex.org/W2038981428","https://openalex.org/W3154819821","https://openalex.org/W1976224891","https://openalex.org/W2740724818","https://openalex.org/W2054788067","https://openalex.org/W1971692815","https://openalex.org/W2337094584","https://openalex.org/W2063593364","https://openalex.org/W2334323920","https://openalex.org/W2072021889"],"abstract_inverted_index":null,"counts_by_year":[],"updated_date":"2026-03-10T14:07:55.174380","created_date":"2025-10-10T00:00:00"}
