期刊
JOURNAL OF DIFFERENTIAL EQUATIONS
卷 168, 期 1, 页码 150-167出版社
ACADEMIC PRESS INC
DOI: 10.1006/jdeq.2000.3882
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We consider a system of ODEs which describes the transmission dynamics of childhood diseases. A center manifold reduction at a bifurcation point has the normal form x' = y, y' = axy + bx(2)y + O(4), indicating a bifurcation of codimension greater than two. A three-parameter unfolding of the normal form is studied to capture possible complex dynamics of the original system which is subjected to certain constraints on the state space due to biological considerations. It is shown that the perturbed system produces homoclinic bifurcation. (C) 2000 Academic Press.
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