Resumen de On constant-sign periodic solutions in modelling the spread of interdependent epidemics

Ravi P. Agarwal , Donal O'Regan, Patricia J. Y. Wong

• We consider the following model that describes the spread of n types of epidemics which are interdependent on each other. Our aim is to establish criteria such that the above system has one or multiple constant-sign periodic solutions , that is, for each is periodic and where is fixed. Examples are also included to illustrate the results obtained.