{"id":"https://openalex.org/W3177502604","doi":"https://doi.org/10.1080/00207160.2021.1954171","title":"Characterization and construction of tridiagonal almost strictly sign regular matrices","display_name":"Characterization and construction of tridiagonal almost strictly sign regular matrices","publication_year":2021,"publication_date":"2021-07-08","ids":{"openalex":"https://openalex.org/W3177502604","doi":"https://doi.org/10.1080/00207160.2021.1954171","mag":"3177502604"},"language":"en","primary_location":{"id":"doi:10.1080/00207160.2021.1954171","is_oa":false,"landing_page_url":"https://doi.org/10.1080/00207160.2021.1954171","pdf_url":null,"source":{"id":"https://openalex.org/S124867444","display_name":"International Journal of Computer Mathematics","issn_l":"0020-7160","issn":["0020-7160","1026-7425","1029-0265"],"is_oa":false,"is_in_doaj":false,"is_core":true,"host_organization":"https://openalex.org/P4310320547","host_organization_name":"Taylor & Francis","host_organization_lineage":["https://openalex.org/P4310320547","https://openalex.org/P4310320449"],"host_organization_lineage_names":["Taylor & Francis","Informa"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"International Journal of Computer 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/A5075813345","display_name":"Policarpo Abascal","orcid":"https://orcid.org/0000-0001-8979-5206"},"institutions":[{"id":"https://openalex.org/I165339363","display_name":"Universidad de Oviedo","ror":"https://ror.org/006gksa02","country_code":"ES","type":"education","lineage":["https://openalex.org/I165339363"]}],"countries":["ES"],"is_corresponding":false,"raw_author_name":"P. Abascal","raw_affiliation_strings":["Dpto. Matem\u00e1ticas, Universidad de Oviedo, Gij\u00f3n, Spain"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Dpto. Matem\u00e1ticas, Universidad de Oviedo, Gij\u00f3n, Spain","institution_ids":["https://openalex.org/I165339363"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5028665106","display_name":"Juan E. Jim\u00e9nez","orcid":"https://orcid.org/0000-0002-7466-8340"},"institutions":[{"id":"https://openalex.org/I165339363","display_name":"Universidad de Oviedo","ror":"https://ror.org/006gksa02","country_code":"ES","type":"education","lineage":["https://openalex.org/I165339363"]}],"countries":["ES"],"is_corresponding":false,"raw_author_name":"J. Jim\u00e9nez","raw_affiliation_strings":["Dpto. Matem\u00e1ticas, Universidad de Oviedo, Gij\u00f3n, Spain"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Dpto. Matem\u00e1ticas, Universidad de Oviedo, Gij\u00f3n, Spain","institution_ids":["https://openalex.org/I165339363"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5018346354","display_name":"Antonio Palacio","orcid":"https://orcid.org/0000-0002-3795-1569"},"institutions":[{"id":"https://openalex.org/I165339363","display_name":"Universidad de Oviedo","ror":"https://ror.org/006gksa02","country_code":"ES","type":"education","lineage":["https://openalex.org/I165339363"]}],"countries":["ES"],"is_corresponding":true,"raw_author_name":"A. Palacio","raw_affiliation_strings":["Dpto. Matem\u00e1ticas, Universidad de Oviedo, Gij\u00f3n, Spain"],"raw_orcid":"https://orcid.org/0000-0002-3795-1569","affiliations":[{"raw_affiliation_string":"Dpto. Matem\u00e1ticas, Universidad de Oviedo, Gij\u00f3n, Spain","institution_ids":["https://openalex.org/I165339363"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5086946679","display_name":"Mar\u00eda Luisa Serrano","orcid":"https://orcid.org/0000-0001-8643-2733"},"institutions":[{"id":"https://openalex.org/I165339363","display_name":"Universidad de Oviedo","ror":"https://ror.org/006gksa02","country_code":"ES","type":"education","lineage":["https://openalex.org/I165339363"]}],"countries":["ES"],"is_corresponding":false,"raw_author_name":"M. L. Serrano","raw_affiliation_strings":["Dpto. Matem\u00e1ticas, Universidad de Oviedo, Gij\u00f3n, Spain"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Dpto. Matem\u00e1ticas, Universidad de Oviedo, Gij\u00f3n, Spain","institution_ids":["https://openalex.org/I165339363"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":1,"corresponding_author_ids":["https://openalex.org/A5018346354"],"corresponding_institution_ids":["https://openalex.org/I165339363"],"apc_list":null,"apc_paid":null,"fwci":0.0805,"has_fulltext":false,"cited_by_count":1,"citation_normalized_percentile":{"value":0.38134381,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":90,"max":94},"biblio":{"volume":"99","issue":"6","first_page":"1124","last_page":"1138"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T11797","display_name":"graph theory and CDMA systems","score":0.9991999864578247,"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":0.9991999864578247,"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"}},{"id":"https://openalex.org/T10792","display_name":"Matrix Theory and Algorithms","score":0.9986000061035156,"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/T11673","display_name":"Advanced Topics in Algebra","score":0.9919000267982483,"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"}}],"keywords":[{"id":"https://openalex.org/keywords/tridiagonal-matrix","display_name":"Tridiagonal matrix","score":0.9707198143005371},{"id":"https://openalex.org/keywords/mathematics","display_name":"Mathematics","score":0.8666466474533081},{"id":"https://openalex.org/keywords/sign","display_name":"Sign (mathematics)","score":0.8020908832550049},{"id":"https://openalex.org/keywords/characterization","display_name":"Characterization (materials science)","score":0.7061427235603333},{"id":"https://openalex.org/keywords/matrix","display_name":"Matrix (chemical analysis)","score":0.5754687190055847},{"id":"https://openalex.org/keywords/tridiagonal-matrix-algorithm","display_name":"Tridiagonal matrix algorithm","score":0.5164673328399658},{"id":"https://openalex.org/keywords/construct","display_name":"Construct (python library)","score":0.5117897391319275},{"id":"https://openalex.org/keywords/band-matrix","display_name":"Band matrix","score":0.4200170636177063},{"id":"https://openalex.org/keywords/algebra-over-a-field","display_name":"Algebra over a field","score":0.4084993600845337},{"id":"https://openalex.org/keywords/pure-mathematics","display_name":"Pure mathematics","score":0.3980938196182251},{"id":"https://openalex.org/keywords/combinatorics","display_name":"Combinatorics","score":0.3395463526248932},{"id":"https://openalex.org/keywords/square-matrix","display_name":"Square matrix","score":0.20661064982414246},{"id":"https://openalex.org/keywords/mathematical-analysis","display_name":"Mathematical analysis","score":0.18290093541145325},{"id":"https://openalex.org/keywords/symmetric-matrix","display_name":"Symmetric matrix","score":0.17802399396896362},{"id":"https://openalex.org/keywords/eigenvalues-and-eigenvectors","display_name":"Eigenvalues and eigenvectors","score":0.07975119352340698},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.06445366144180298}],"concepts":[{"id":"https://openalex.org/C51647924","wikidata":"https://www.wikidata.org/wiki/Q1755277","display_name":"Tridiagonal matrix","level":3,"score":0.9707198143005371},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.8666466474533081},{"id":"https://openalex.org/C139676723","wikidata":"https://www.wikidata.org/wiki/Q1193832","display_name":"Sign (mathematics)","level":2,"score":0.8020908832550049},{"id":"https://openalex.org/C2780841128","wikidata":"https://www.wikidata.org/wiki/Q5073781","display_name":"Characterization (materials science)","level":2,"score":0.7061427235603333},{"id":"https://openalex.org/C106487976","wikidata":"https://www.wikidata.org/wiki/Q685816","display_name":"Matrix (chemical analysis)","level":2,"score":0.5754687190055847},{"id":"https://openalex.org/C176603272","wikidata":"https://www.wikidata.org/wiki/Q1819156","display_name":"Tridiagonal matrix algorithm","level":4,"score":0.5164673328399658},{"id":"https://openalex.org/C2780801425","wikidata":"https://www.wikidata.org/wiki/Q5164392","display_name":"Construct (python library)","level":2,"score":0.5117897391319275},{"id":"https://openalex.org/C33343441","wikidata":"https://www.wikidata.org/wiki/Q806350","display_name":"Band matrix","level":5,"score":0.4200170636177063},{"id":"https://openalex.org/C136119220","wikidata":"https://www.wikidata.org/wiki/Q1000660","display_name":"Algebra over a field","level":2,"score":0.4084993600845337},{"id":"https://openalex.org/C202444582","wikidata":"https://www.wikidata.org/wiki/Q837863","display_name":"Pure mathematics","level":1,"score":0.3980938196182251},{"id":"https://openalex.org/C114614502","wikidata":"https://www.wikidata.org/wiki/Q76592","display_name":"Combinatorics","level":1,"score":0.3395463526248932},{"id":"https://openalex.org/C69044650","wikidata":"https://www.wikidata.org/wiki/Q2739329","display_name":"Square matrix","level":4,"score":0.20661064982414246},{"id":"https://openalex.org/C134306372","wikidata":"https://www.wikidata.org/wiki/Q7754","display_name":"Mathematical analysis","level":1,"score":0.18290093541145325},{"id":"https://openalex.org/C54848796","wikidata":"https://www.wikidata.org/wiki/Q339011","display_name":"Symmetric matrix","level":3,"score":0.17802399396896362},{"id":"https://openalex.org/C158693339","wikidata":"https://www.wikidata.org/wiki/Q190524","display_name":"Eigenvalues and eigenvectors","level":2,"score":0.07975119352340698},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.06445366144180298},{"id":"https://openalex.org/C192562407","wikidata":"https://www.wikidata.org/wiki/Q228736","display_name":"Materials science","level":0,"score":0.0},{"id":"https://openalex.org/C121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","level":0,"score":0.0},{"id":"https://openalex.org/C159985019","wikidata":"https://www.wikidata.org/wiki/Q181790","display_name":"Composite material","level":1,"score":0.0},{"id":"https://openalex.org/C171250308","wikidata":"https://www.wikidata.org/wiki/Q11468","display_name":"Nanotechnology","level":1,"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/C199360897","wikidata":"https://www.wikidata.org/wiki/Q9143","display_name":"Programming language","level":1,"score":0.0}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1080/00207160.2021.1954171","is_oa":false,"landing_page_url":"https://doi.org/10.1080/00207160.2021.1954171","pdf_url":null,"source":{"id":"https://openalex.org/S124867444","display_name":"International Journal of Computer Mathematics","issn_l":"0020-7160","issn":["0020-7160","1026-7425","1029-0265"],"is_oa":false,"is_in_doaj":false,"is_core":true,"host_organization":"https://openalex.org/P4310320547","host_organization_name":"Taylor & Francis","host_organization_lineage":["https://openalex.org/P4310320547","https://openalex.org/P4310320449"],"host_organization_lineage_names":["Taylor & Francis","Informa"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"International Journal of Computer Mathematics","raw_type":"journal-article"}],"best_oa_location":null,"sustainable_development_goals":[{"display_name":"Sustainable cities and communities","id":"https://metadata.un.org/sdg/11","score":0.7699999809265137}],"awards":[],"funders":[],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":13,"referenced_works":["https://openalex.org/W315762275","https://openalex.org/W1925983139","https://openalex.org/W1981778041","https://openalex.org/W1992228866","https://openalex.org/W2028073195","https://openalex.org/W2056195809","https://openalex.org/W2066339338","https://openalex.org/W2094302535","https://openalex.org/W2132340875","https://openalex.org/W2488921732","https://openalex.org/W2794119491","https://openalex.org/W4211000381","https://openalex.org/W4299822471"],"related_works":["https://openalex.org/W2358629369","https://openalex.org/W4212973497","https://openalex.org/W2360550119","https://openalex.org/W2348139359","https://openalex.org/W1552633559","https://openalex.org/W1980786482","https://openalex.org/W233188489","https://openalex.org/W2353337315","https://openalex.org/W1971359254","https://openalex.org/W1966157165"],"abstract_inverted_index":{"In":[0],"this":[1,23],"paper,":[2],"a":[3,28],"method":[4],"to":[5],"construct":[6],"tridiagonal":[7],"almost":[8],"strictly":[9],"sign":[10,39],"regular":[11],"(ASSR)":[12],"matrices":[13],"is":[14],"presented.":[15],"Moreover,":[16],"we":[17,26],"study":[18],"the":[19,38],"necessary":[20],"conditions":[21],"for":[22],"construction":[24],"and":[25],"provide":[27],"characterization":[29],"of":[30,37,40,43],"an":[31],"ASSR":[32],"n\u00d7n":[33],"matrix":[34],"in":[35],"terms":[36],"n":[41],"minors":[42],"it.":[44]},"counts_by_year":[{"year":2024,"cited_by_count":1}],"updated_date":"2026-08-15T07:11:24.734988","created_date":"2025-10-10T00:00:00"}
