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Local stability of an SIR epidemic model and effect of time delay
We describe an SIR epidemic model with a discrete time lag, analyse the local stability of its equilibria as well as the effects of delay on the reproduction number and on the dynamical behaviour of the system. The model has two equilibria—a necessary condition for local asymptotic stability is give...
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Published in: | Mathematical methods in the applied sciences 2009-11, Vol.32 (16), p.2160-2175 |
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container_title | Mathematical methods in the applied sciences |
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creator | Tchuenche, Jean M. Nwagwo, Alexander |
description | We describe an SIR epidemic model with a discrete time lag, analyse the local stability of its equilibria as well as the effects of delay on the reproduction number and on the dynamical behaviour of the system. The model has two equilibria—a necessary condition for local asymptotic stability is given. The proofs are based on linearization and the application of Lyapunov functional approach. An upper bound of the critical time delay for which the model remains valid is derived. Numerical simulations are carried out to illustrate the effect of time delay which tends to reduce the epidemic threshold. Copyright © 2009 John Wiley & Sons, Ltd. |
doi_str_mv | 10.1002/mma.1136 |
format | article |
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The model has two equilibria—a necessary condition for local asymptotic stability is given. The proofs are based on linearization and the application of Lyapunov functional approach. An upper bound of the critical time delay for which the model remains valid is derived. Numerical simulations are carried out to illustrate the effect of time delay which tends to reduce the epidemic threshold. Copyright © 2009 John Wiley & Sons, Ltd.</description><identifier>ISSN: 0170-4214</identifier><identifier>EISSN: 1099-1476</identifier><identifier>DOI: 10.1002/mma.1136</identifier><identifier>CODEN: MMSCDB</identifier><language>eng</language><publisher>Chichester, UK: John Wiley & Sons, Ltd</publisher><subject>Exact sciences and technology ; Global analysis, analysis on manifolds ; local stability ; Lyapunov function ; Mathematical analysis ; Mathematics ; Sciences and techniques of general use ; SIR model ; time delay ; Topology. Manifolds and cell complexes. Global analysis and analysis on manifolds</subject><ispartof>Mathematical methods in the applied sciences, 2009-11, Vol.32 (16), p.2160-2175</ispartof><rights>Copyright © 2009 John Wiley & Sons, Ltd.</rights><rights>2009 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c3336-49fc2be25c3552d9ce86b07286c73406cd21308804e49030f57f16c754d548123</citedby><cites>FETCH-LOGICAL-c3336-49fc2be25c3552d9ce86b07286c73406cd21308804e49030f57f16c754d548123</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,776,780,27901,27902</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=22027376$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Tchuenche, Jean M.</creatorcontrib><creatorcontrib>Nwagwo, Alexander</creatorcontrib><title>Local stability of an SIR epidemic model and effect of time delay</title><title>Mathematical methods in the applied sciences</title><addtitle>Math. Meth. Appl. Sci</addtitle><description>We describe an SIR epidemic model with a discrete time lag, analyse the local stability of its equilibria as well as the effects of delay on the reproduction number and on the dynamical behaviour of the system. The model has two equilibria—a necessary condition for local asymptotic stability is given. The proofs are based on linearization and the application of Lyapunov functional approach. An upper bound of the critical time delay for which the model remains valid is derived. Numerical simulations are carried out to illustrate the effect of time delay which tends to reduce the epidemic threshold. 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Manifolds and cell complexes. Global analysis and analysis on manifolds</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Tchuenche, Jean M.</creatorcontrib><creatorcontrib>Nwagwo, Alexander</creatorcontrib><collection>Istex</collection><collection>Pascal-Francis</collection><collection>CrossRef</collection><jtitle>Mathematical methods in the applied sciences</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Tchuenche, Jean M.</au><au>Nwagwo, Alexander</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Local stability of an SIR epidemic model and effect of time delay</atitle><jtitle>Mathematical methods in the applied sciences</jtitle><addtitle>Math. Meth. Appl. 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Copyright © 2009 John Wiley & Sons, Ltd.</abstract><cop>Chichester, UK</cop><pub>John Wiley & Sons, Ltd</pub><doi>10.1002/mma.1136</doi><tpages>16</tpages></addata></record> |
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subjects | Exact sciences and technology Global analysis, analysis on manifolds local stability Lyapunov function Mathematical analysis Mathematics Sciences and techniques of general use SIR model time delay Topology. Manifolds and cell complexes. Global analysis and analysis on manifolds |
title | Local stability of an SIR epidemic model and effect of time delay |
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