{"id":"https://openalex.org/W2039232806","doi":"https://doi.org/10.1007/bf02142318","title":"Characterization of regular singular linear systems of difference equations","display_name":"Characterization of regular singular linear systems of difference equations","publication_year":1991,"publication_date":"1991-06-01","ids":{"openalex":"https://openalex.org/W2039232806","doi":"https://doi.org/10.1007/bf02142318","mag":"2039232806"},"language":"en","primary_location":{"id":"doi:10.1007/bf02142318","is_oa":false,"landing_page_url":"https://doi.org/10.1007/bf02142318","pdf_url":null,"source":{"id":"https://openalex.org/S117494069","display_name":"Numerical Algorithms","issn_l":"1017-1398","issn":["1017-1398","1572-9265"],"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":"Numerical Algorithms","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/A5109097015","display_name":"M. A. Barkatou","orcid":null},"institutions":[{"id":"https://openalex.org/I3019441195","display_name":"Laboratoire de Math\u00e9matiques d'Orsay","ror":"https://ror.org/03ab0zs98","country_code":"FR","type":"facility","lineage":["https://openalex.org/I1294671590","https://openalex.org/I277688954","https://openalex.org/I3019441195"]}],"countries":["FR"],"is_corresponding":true,"raw_author_name":"M. A. Barkatou","raw_affiliation_strings":["D\u00e9partement de Math\u00e9matiques, Facult\u00e9 des Sciences, 123 Avenue Albert Thomas, 87000, Limoges-Cedex, France","D\u00e9partement de Math\u00e9matiques, Facult\u00e9 des Sciences, Limoges-Cedex, France"],"affiliations":[{"raw_affiliation_string":"D\u00e9partement de Math\u00e9matiques, Facult\u00e9 des Sciences, 123 Avenue Albert Thomas, 87000, Limoges-Cedex, France","institution_ids":["https://openalex.org/I3019441195"]},{"raw_affiliation_string":"D\u00e9partement de Math\u00e9matiques, Facult\u00e9 des Sciences, Limoges-Cedex, France","institution_ids":["https://openalex.org/I3019441195"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":1,"corresponding_author_ids":["https://openalex.org/A5109097015"],"corresponding_institution_ids":["https://openalex.org/I3019441195"],"apc_list":{"value":2390,"currency":"EUR","value_usd":2990},"apc_paid":null,"fwci":0.0,"has_fulltext":false,"cited_by_count":7,"citation_normalized_percentile":{"value":0.17309897,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":90,"max":94},"biblio":{"volume":"1","issue":"2","first_page":"139","last_page":"154"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T11435","display_name":"Polynomial and algebraic computation","score":0.9607999920845032,"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/T11435","display_name":"Polynomial and algebraic computation","score":0.9607999920845032,"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":0.8602075576782227},{"id":"https://openalex.org/keywords/singularity","display_name":"Singularity","score":0.8498956561088562},{"id":"https://openalex.org/keywords/theory-of-computation","display_name":"Theory of computation","score":0.6474491357803345},{"id":"https://openalex.org/keywords/system-of-linear-equations","display_name":"System of linear equations","score":0.525558590888977},{"id":"https://openalex.org/keywords/computation","display_name":"Computation","score":0.49726393818855286},{"id":"https://openalex.org/keywords/symbolic-computation","display_name":"Symbolic computation","score":0.4820173978805542},{"id":"https://openalex.org/keywords/linear-equation","display_name":"Linear equation","score":0.4813188314437866},{"id":"https://openalex.org/keywords/linear-system","display_name":"Linear system","score":0.477670282125473},{"id":"https://openalex.org/keywords/invariant","display_name":"Invariant (physics)","score":0.44104212522506714},{"id":"https://openalex.org/keywords/algebra-over-a-field","display_name":"Algebra over a field","score":0.3823585510253906},{"id":"https://openalex.org/keywords/mathematical-analysis","display_name":"Mathematical analysis","score":0.33004826307296753},{"id":"https://openalex.org/keywords/applied-mathematics","display_name":"Applied mathematics","score":0.32115286588668823},{"id":"https://openalex.org/keywords/pure-mathematics","display_name":"Pure mathematics","score":0.31916138529777527},{"id":"https://openalex.org/keywords/algorithm","display_name":"Algorithm","score":0.08580726385116577}],"concepts":[{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.8602075576782227},{"id":"https://openalex.org/C16171025","wikidata":"https://www.wikidata.org/wiki/Q863349","display_name":"Singularity","level":2,"score":0.8498956561088562},{"id":"https://openalex.org/C24858836","wikidata":"https://www.wikidata.org/wiki/Q844718","display_name":"Theory of computation","level":2,"score":0.6474491357803345},{"id":"https://openalex.org/C94523830","wikidata":"https://www.wikidata.org/wiki/Q11203","display_name":"System of linear equations","level":2,"score":0.525558590888977},{"id":"https://openalex.org/C45374587","wikidata":"https://www.wikidata.org/wiki/Q12525525","display_name":"Computation","level":2,"score":0.49726393818855286},{"id":"https://openalex.org/C110812573","wikidata":"https://www.wikidata.org/wiki/Q175515","display_name":"Symbolic computation","level":2,"score":0.4820173978805542},{"id":"https://openalex.org/C77346573","wikidata":"https://www.wikidata.org/wiki/Q484637","display_name":"Linear equation","level":2,"score":0.4813188314437866},{"id":"https://openalex.org/C6802819","wikidata":"https://www.wikidata.org/wiki/Q1072174","display_name":"Linear system","level":2,"score":0.477670282125473},{"id":"https://openalex.org/C190470478","wikidata":"https://www.wikidata.org/wiki/Q2370229","display_name":"Invariant (physics)","level":2,"score":0.44104212522506714},{"id":"https://openalex.org/C136119220","wikidata":"https://www.wikidata.org/wiki/Q1000660","display_name":"Algebra over a field","level":2,"score":0.3823585510253906},{"id":"https://openalex.org/C134306372","wikidata":"https://www.wikidata.org/wiki/Q7754","display_name":"Mathematical analysis","level":1,"score":0.33004826307296753},{"id":"https://openalex.org/C28826006","wikidata":"https://www.wikidata.org/wiki/Q33521","display_name":"Applied mathematics","level":1,"score":0.32115286588668823},{"id":"https://openalex.org/C202444582","wikidata":"https://www.wikidata.org/wiki/Q837863","display_name":"Pure mathematics","level":1,"score":0.31916138529777527},{"id":"https://openalex.org/C11413529","wikidata":"https://www.wikidata.org/wiki/Q8366","display_name":"Algorithm","level":1,"score":0.08580726385116577},{"id":"https://openalex.org/C37914503","wikidata":"https://www.wikidata.org/wiki/Q156495","display_name":"Mathematical physics","level":1,"score":0.0}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1007/bf02142318","is_oa":false,"landing_page_url":"https://doi.org/10.1007/bf02142318","pdf_url":null,"source":{"id":"https://openalex.org/S117494069","display_name":"Numerical Algorithms","issn_l":"1017-1398","issn":["1017-1398","1572-9265"],"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":"Numerical Algorithms","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":5,"referenced_works":["https://openalex.org/W70762045","https://openalex.org/W2005668498","https://openalex.org/W2061213547","https://openalex.org/W2120078368","https://openalex.org/W2319479038"],"related_works":["https://openalex.org/W2008987582","https://openalex.org/W195825275","https://openalex.org/W153415882","https://openalex.org/W2365527693","https://openalex.org/W2739650862","https://openalex.org/W4252024106","https://openalex.org/W2500993308","https://openalex.org/W3097421206","https://openalex.org/W2035371040","https://openalex.org/W2389121573"],"abstract_inverted_index":null,"counts_by_year":[{"year":2018,"cited_by_count":1},{"year":2015,"cited_by_count":1}],"updated_date":"2025-11-06T03:46:38.306776","created_date":"2025-10-10T00:00:00"}