{"id":"https://openalex.org/W2066503751","doi":"https://doi.org/10.1016/0012-365x(94)90117-1","title":"Classification of Hadamard matrices of order 28 with hall sets","display_name":"Classification of Hadamard matrices of order 28 with hall sets","publication_year":1994,"publication_date":"1994-04-01","ids":{"openalex":"https://openalex.org/W2066503751","doi":"https://doi.org/10.1016/0012-365x(94)90117-1","mag":"2066503751"},"language":"en","primary_location":{"id":"doi:10.1016/0012-365x(94)90117-1","is_oa":true,"landing_page_url":"https://doi.org/10.1016/0012-365x(94)90117-1","pdf_url":"https://www.sciencedirect.com/science/article/pii/0012365X94901171/pdf","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":true,"oa_status":"bronze","oa_url":"https://www.sciencedirect.com/science/article/pii/0012365X94901171/pdf","any_repository_has_fulltext":false},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5036353568","display_name":"Hiroshi Kimura","orcid":"https://orcid.org/0000-0001-8063-5660"},"institutions":[{"id":"https://openalex.org/I43545212","display_name":"Ehime University","ror":"https://ror.org/017hkng22","country_code":"JP","type":"education","lineage":["https://openalex.org/I43545212"]}],"countries":["JP"],"is_corresponding":true,"raw_author_name":"Hiroshi Kimura","raw_affiliation_strings":["Department of Mathematics, Ehime University, Matsuyama 790, Japan","Department of Mathematics, Ehime University, Matsuyama, 790, Japan"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Mathematics, Ehime University, Matsuyama 790, Japan","institution_ids":["https://openalex.org/I43545212"]},{"raw_affiliation_string":"Department of Mathematics, Ehime University, Matsuyama, 790, Japan","institution_ids":["https://openalex.org/I43545212"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":1,"corresponding_author_ids":["https://openalex.org/A5036353568"],"corresponding_institution_ids":["https://openalex.org/I43545212"],"apc_list":{"value":3000,"currency":"USD","value_usd":3000},"apc_paid":null,"fwci":1.8671,"has_fulltext":true,"cited_by_count":33,"citation_normalized_percentile":{"value":0.84210248,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":89,"max":94},"biblio":{"volume":"128","issue":"1-3","first_page":"257","last_page":"268"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T11797","display_name":"graph theory and CDMA systems","score":0.9995999932289124,"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":0.9995999932289124,"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/mathematics","display_name":"Mathematics","score":0.870542049407959},{"id":"https://openalex.org/keywords/hadamard-transform","display_name":"Hadamard transform","score":0.826480507850647},{"id":"https://openalex.org/keywords/hadamard-matrix","display_name":"Hadamard matrix","score":0.750372052192688},{"id":"https://openalex.org/keywords/complex-hadamard-matrix","display_name":"Complex Hadamard matrix","score":0.6968547701835632},{"id":"https://openalex.org/keywords/combinatorics","display_name":"Combinatorics","score":0.6839942336082458},{"id":"https://openalex.org/keywords/order","display_name":"Order (exchange)","score":0.603934109210968},{"id":"https://openalex.org/keywords/hadamards-inequality","display_name":"Hadamard's inequality","score":0.6025993227958679},{"id":"https://openalex.org/keywords/equivalence","display_name":"Equivalence (formal languages)","score":0.5003759860992432},{"id":"https://openalex.org/keywords/hadamards-maximal-determinant-problem","display_name":"Hadamard's maximal determinant problem","score":0.49025848507881165},{"id":"https://openalex.org/keywords/discrete-mathematics","display_name":"Discrete mathematics","score":0.4611288607120514},{"id":"https://openalex.org/keywords/mathematical-analysis","display_name":"Mathematical analysis","score":0.0706806480884552}],"concepts":[{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.870542049407959},{"id":"https://openalex.org/C60292330","wikidata":"https://www.wikidata.org/wiki/Q1014065","display_name":"Hadamard transform","level":2,"score":0.826480507850647},{"id":"https://openalex.org/C30463267","wikidata":"https://www.wikidata.org/wiki/Q1422682","display_name":"Hadamard matrix","level":3,"score":0.750372052192688},{"id":"https://openalex.org/C6497535","wikidata":"https://www.wikidata.org/wiki/Q5156556","display_name":"Complex Hadamard matrix","level":4,"score":0.6968547701835632},{"id":"https://openalex.org/C114614502","wikidata":"https://www.wikidata.org/wiki/Q76592","display_name":"Combinatorics","level":1,"score":0.6839942336082458},{"id":"https://openalex.org/C182306322","wikidata":"https://www.wikidata.org/wiki/Q1779371","display_name":"Order (exchange)","level":2,"score":0.603934109210968},{"id":"https://openalex.org/C31021346","wikidata":"https://www.wikidata.org/wiki/Q1365087","display_name":"Hadamard's inequality","level":4,"score":0.6025993227958679},{"id":"https://openalex.org/C2780069185","wikidata":"https://www.wikidata.org/wiki/Q7977945","display_name":"Equivalence (formal languages)","level":2,"score":0.5003759860992432},{"id":"https://openalex.org/C121334634","wikidata":"https://www.wikidata.org/wiki/Q5637579","display_name":"Hadamard's maximal determinant problem","level":5,"score":0.49025848507881165},{"id":"https://openalex.org/C118615104","wikidata":"https://www.wikidata.org/wiki/Q121416","display_name":"Discrete mathematics","level":1,"score":0.4611288607120514},{"id":"https://openalex.org/C134306372","wikidata":"https://www.wikidata.org/wiki/Q7754","display_name":"Mathematical analysis","level":1,"score":0.0706806480884552},{"id":"https://openalex.org/C162324750","wikidata":"https://www.wikidata.org/wiki/Q8134","display_name":"Economics","level":0,"score":0.0},{"id":"https://openalex.org/C10138342","wikidata":"https://www.wikidata.org/wiki/Q43015","display_name":"Finance","level":1,"score":0.0}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1016/0012-365x(94)90117-1","is_oa":true,"landing_page_url":"https://doi.org/10.1016/0012-365x(94)90117-1","pdf_url":"https://www.sciencedirect.com/science/article/pii/0012365X94901171/pdf","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":{"id":"doi:10.1016/0012-365x(94)90117-1","is_oa":true,"landing_page_url":"https://doi.org/10.1016/0012-365x(94)90117-1","pdf_url":"https://www.sciencedirect.com/science/article/pii/0012365X94901171/pdf","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"},"sustainable_development_goals":[],"awards":[],"funders":[],"has_content":{"pdf":true,"grobid_xml":true},"content_urls":{"pdf":"https://content.openalex.org/works/W2066503751.pdf","grobid_xml":"https://content.openalex.org/works/W2066503751.grobid-xml"},"referenced_works_count":14,"referenced_works":["https://openalex.org/W632376093","https://openalex.org/W789681013","https://openalex.org/W1994047382","https://openalex.org/W2008511823","https://openalex.org/W2021056517","https://openalex.org/W2055214429","https://openalex.org/W2057893457","https://openalex.org/W2089128722","https://openalex.org/W2131144468","https://openalex.org/W2170886510","https://openalex.org/W4205579146","https://openalex.org/W6620398171","https://openalex.org/W6622635206","https://openalex.org/W6664575735"],"related_works":["https://openalex.org/W1976224891","https://openalex.org/W1971692815","https://openalex.org/W4226106482","https://openalex.org/W2003940980","https://openalex.org/W2740594951","https://openalex.org/W2054788067","https://openalex.org/W2028598007","https://openalex.org/W2131599704","https://openalex.org/W2796326658","https://openalex.org/W1995950135"],"abstract_inverted_index":null,"counts_by_year":[{"year":2020,"cited_by_count":1},{"year":2019,"cited_by_count":1},{"year":2017,"cited_by_count":1},{"year":2012,"cited_by_count":1}],"updated_date":"2026-08-03T07:22:36.454288","created_date":"2025-10-10T00:00:00"}