{"id":"https://openalex.org/W2070726390","doi":"https://doi.org/10.1016/s0096-3003(02)00531-3","title":"Instability results for certain systems of fourth and fifth order differential equations","display_name":"Instability results for certain systems of fourth and fifth order differential equations","publication_year":2003,"publication_date":"2003-02-04","ids":{"openalex":"https://openalex.org/W2070726390","doi":"https://doi.org/10.1016/s0096-3003(02)00531-3","mag":"2070726390"},"language":"en","primary_location":{"id":"doi:10.1016/s0096-3003(02)00531-3","is_oa":false,"landing_page_url":"https://doi.org/10.1016/s0096-3003(02)00531-3","pdf_url":null,"source":{"id":"https://openalex.org/S50372074","display_name":"Applied Mathematics and Computation","issn_l":"0096-3003","issn":["0096-3003","1873-5649"],"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":"Applied Mathematics and Computation","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/A5055582358","display_name":"A. I. Sadek","orcid":null},"institutions":[{"id":"https://openalex.org/I91041137","display_name":"Assiut University","ror":"https://ror.org/01jaj8n65","country_code":"EG","type":"education","lineage":["https://openalex.org/I91041137"]}],"countries":["EG"],"is_corresponding":true,"raw_author_name":"A.I. Sadek","raw_affiliation_strings":["Department of Mathematics, Faculty of Science, Assiut University, 71516 Assiut, Egypt","Department of Mathematics, Faculty of Science, Assiut University, 71516, Assiut, Egypt"],"affiliations":[{"raw_affiliation_string":"Department of Mathematics, Faculty of Science, Assiut University, 71516 Assiut, Egypt","institution_ids":["https://openalex.org/I91041137"]},{"raw_affiliation_string":"Department of Mathematics, Faculty of Science, Assiut University, 71516, Assiut, Egypt","institution_ids":["https://openalex.org/I91041137"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":1,"corresponding_author_ids":["https://openalex.org/A5055582358"],"corresponding_institution_ids":["https://openalex.org/I91041137"],"apc_list":{"value":3550,"currency":"USD","value_usd":3550},"apc_paid":null,"fwci":1.0149,"has_fulltext":false,"cited_by_count":18,"citation_normalized_percentile":{"value":0.73726263,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":90,"max":97},"biblio":{"volume":"145","issue":"2-3","first_page":"541","last_page":"549"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10541","display_name":"Nonlinear Differential Equations Analysis","score":0.9775000214576721,"subfield":{"id":"https://openalex.org/subfields/2604","display_name":"Applied Mathematics"},"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/T10541","display_name":"Nonlinear Differential Equations Analysis","score":0.9775000214576721,"subfield":{"id":"https://openalex.org/subfields/2604","display_name":"Applied Mathematics"},"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/T12727","display_name":"Differential Equations and Numerical Methods","score":0.9570000171661377,"subfield":{"id":"https://openalex.org/subfields/2612","display_name":"Numerical Analysis"},"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/differential-equation","display_name":"Differential equation","score":0.5968838930130005},{"id":"https://openalex.org/keywords/mathematics","display_name":"Mathematics","score":0.5953519344329834},{"id":"https://openalex.org/keywords/instability","display_name":"Instability","score":0.5681079030036926},{"id":"https://openalex.org/keywords/applied-mathematics","display_name":"Applied mathematics","score":0.5501289963722229},{"id":"https://openalex.org/keywords/order","display_name":"Order (exchange)","score":0.5134247541427612},{"id":"https://openalex.org/keywords/second-order-equation","display_name":"Second order equation","score":0.41192638874053955},{"id":"https://openalex.org/keywords/calculus","display_name":"Calculus (dental)","score":0.4108414649963379},{"id":"https://openalex.org/keywords/mathematical-analysis","display_name":"Mathematical analysis","score":0.40090030431747437},{"id":"https://openalex.org/keywords/physics","display_name":"Physics","score":0.1878335177898407},{"id":"https://openalex.org/keywords/economics","display_name":"Economics","score":0.1247565746307373},{"id":"https://openalex.org/keywords/mechanics","display_name":"Mechanics","score":0.09367191791534424},{"id":"https://openalex.org/keywords/medicine","display_name":"Medicine","score":0.07303813099861145}],"concepts":[{"id":"https://openalex.org/C78045399","wikidata":"https://www.wikidata.org/wiki/Q11214","display_name":"Differential equation","level":2,"score":0.5968838930130005},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.5953519344329834},{"id":"https://openalex.org/C207821765","wikidata":"https://www.wikidata.org/wiki/Q405372","display_name":"Instability","level":2,"score":0.5681079030036926},{"id":"https://openalex.org/C28826006","wikidata":"https://www.wikidata.org/wiki/Q33521","display_name":"Applied mathematics","level":1,"score":0.5501289963722229},{"id":"https://openalex.org/C182306322","wikidata":"https://www.wikidata.org/wiki/Q1779371","display_name":"Order (exchange)","level":2,"score":0.5134247541427612},{"id":"https://openalex.org/C2992663684","wikidata":"https://www.wikidata.org/wiki/Q11214","display_name":"Second order equation","level":3,"score":0.41192638874053955},{"id":"https://openalex.org/C2777686260","wikidata":"https://www.wikidata.org/wiki/Q144037","display_name":"Calculus (dental)","level":2,"score":0.4108414649963379},{"id":"https://openalex.org/C134306372","wikidata":"https://www.wikidata.org/wiki/Q7754","display_name":"Mathematical analysis","level":1,"score":0.40090030431747437},{"id":"https://openalex.org/C121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","level":0,"score":0.1878335177898407},{"id":"https://openalex.org/C162324750","wikidata":"https://www.wikidata.org/wiki/Q8134","display_name":"Economics","level":0,"score":0.1247565746307373},{"id":"https://openalex.org/C57879066","wikidata":"https://www.wikidata.org/wiki/Q41217","display_name":"Mechanics","level":1,"score":0.09367191791534424},{"id":"https://openalex.org/C71924100","wikidata":"https://www.wikidata.org/wiki/Q11190","display_name":"Medicine","level":0,"score":0.07303813099861145},{"id":"https://openalex.org/C199343813","wikidata":"https://www.wikidata.org/wiki/Q12128","display_name":"Dentistry","level":1,"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/s0096-3003(02)00531-3","is_oa":false,"landing_page_url":"https://doi.org/10.1016/s0096-3003(02)00531-3","pdf_url":null,"source":{"id":"https://openalex.org/S50372074","display_name":"Applied Mathematics and Computation","issn_l":"0096-3003","issn":["0096-3003","1873-5649"],"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":"Applied Mathematics and Computation","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":2,"referenced_works":["https://openalex.org/W1979235780","https://openalex.org/W2107077501"],"related_works":["https://openalex.org/W1570780624","https://openalex.org/W2022300913","https://openalex.org/W2322569264","https://openalex.org/W2257349530","https://openalex.org/W2093673119","https://openalex.org/W2077461433","https://openalex.org/W14400985","https://openalex.org/W2092318487","https://openalex.org/W2072100489","https://openalex.org/W2382413794"],"abstract_inverted_index":null,"counts_by_year":[{"year":2016,"cited_by_count":1},{"year":2015,"cited_by_count":3},{"year":2013,"cited_by_count":3},{"year":2012,"cited_by_count":2}],"updated_date":"2025-11-06T03:46:38.306776","created_date":"2025-10-10T00:00:00"}