The cohort feedback model with symmetric net maternity.
"In this paper we consider the simplest and most widely used demographic feedback model, the birth-response cohort feedback model.  In the case of symmetric net maternity, we put the model into a form in which one of the rare global bifurcation theorems in the mathematical literature can be brought to bear.  As a consequence, we prove that the model has solutions with period exactly twice the mean age of net maternity for at least a specified range of parameter values which include cycles of non-infinitesimal amplitude." (SUMMARY IN FRE)
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D000367:Age Factors; D015331:Cohort Studies; D003710:Demography; D005298:Fertility; D008962:Models, Theoretical; D011153:Population; D011154:Population Characteristics; D011157:Population Dynamics
Age Factors; Cohort Analysis; Demographic Factors; Fertility; Mathematical Model; Models, Theoretical; Population; Population Characteristics; Population Dynamics; World