Applications of Mathematics

, Volume 57, Issue 6, pp 601–616 | Cite as

Existence of positive periodic solutions of an SEIR model with periodic coefficients



An SEIR model with periodic coefficients in epidemiology is considered. The global existence of periodic solutions with strictly positive components for this model is established by using the method of coincidence degree. Furthermore, a sufficient condition for the global stability of this model is obtained. An example based on the transmission of respiratory syncytial virus (RSV) is included.


epidemic model coincidence degree Fredholm mapping 

MSC 2010

34C25 54H25 92D30 


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Copyright information

© Institute of Mathematics of the Academy of Sciences of the Czech Republic, Praha, Czech Republic 2012

Authors and Affiliations

  1. 1.School of Mathematics and StatisticsXi’an Jiaotong UniversityXi’anP.R.China
  2. 2.School of ScienceXi’an Polytechnic UniversityXi’anP.R. China
  3. 3.College of Mathematics and System SciencesXinjiang UniversityUrumqiP.R.China

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