[PDF] Top 20 Propuesta de modelo institucional para la Comunidad Sudamericana de Naciones

... mathematics. Stability and direction of the Hopf bifurcation for the predator-prey system have been discussed by using normal form theory and center manifold theory ...[5,6,10,13,15,16,17]. ... See full document

... 3.3 Direction and Stability of Hopf bifurcation In this section we shall study the direction of the Hopf bifurcations and stability of bifurcating periodic solutions by ... See full document

... the stability of nonnegative equilibrium ...existence, direction, and stability of Hopf bifurcation by using Poincare–Andronov Hopf bifurcation ... See full document

... a Hopf bifurcation in a paddy ecosystem. If a Hopf bifurcation exists in a paddy ecosystem, the stability of the system will be ...the Hopf bifur- cation by using the existence ... See full document

... Abstract: In this paper, an epidemiological model with delay and media coverage is proposed and analyzed. Both the disease-free and endemic equilibria are found and their stability are studied by using the theory ... See full document

... The paper is organized as follows. In Section , a producer-scrounger model with age- structure in scrounger is derived. In Section , the basic theory, including existence, uniqueness, positivity and boundedness of ... See full document

... A delayed SIR epidemic model in which the susceptible are assumed to satisfy the logistic equation will be taken up for detailed study. The locally asymptotical stability of the disease-free equilibrium and ... See full document

... studied Hopf bifurcation for this model with ...the stability and bifurcation of the equilibrium by applying the method of multiple ...the stability and Hopf bifurcation ... See full document

... Abstract. In this paper, an SIRI epidemiological model with relapse and a time delay describing the latent period of the disease is investigated. In the model, it is assumed that the susceptible population is subject to ... See full document

... local stability of the positive equilibria is studied, and we get the conditions to determine the stability of the positive ...that Hopf bifurcation occurs near the positive equilibrium when ... See full document

... the stability analysis of feasible equilibria and find the existence of a Hopf bifurcation at the coexistence equilib- ...The stability and direction of periodic solutions bifurcating ... See full document

... the stability of a model of non-linear differential arising from diabetes model without time delay and with time ...of stability and hopf- bifurcation for both methods are consistence with the ... See full document

... linear stability of the model and the local Hopf bifurcation are studied and we derived the conditions for the stability and the existence of Hopf bifurcation at the equilibrium ... See full document

... the stability and the Neimark-Sacker bifurcation (also called Hopf bifurcation for maps) of the equilibrium (0, 0) of system ...totical stability of the equilibrium (0, 0) of ... See full document

... horizontal direction is balanced by an equal and opposite motion ...ariant bifurcation theory allows us to understand the steady and time-dependent ways in which a pattern can travel when a mirror symmetry ... See full document

... and stability of equilibria are ...the direction of the Hopf bifurcation and the stability of the bifurcating periodic solutions is derived by using the normal form and the center ... See full document

... Where is the Jacobian matrix of of order . The system has invariant subspaces , , , corresponding to the span of the generalised eigenvectors, which in turn correspond to eigenvalues having negative real part, positive ... See full document

... that Hopf bifurcation occurs when these delays pass through a sequence of critical ...the stability and the direction of the Hopf bifurcation periodic solutions bifurcating from ... See full document

... If a pair of complex roots with negative real parts and non-zero imaginary parts cross the imaginary axis as τ increases, this potentially results in Hopf bifurcation and the positive equilibrium E ∗ loses ... See full document

... The effect of the alternative resource and time delay on conservation of forestry biomass is stu- died by considering a nonlinear mathematical model. In this paper, interaction between forestry biomass, industrialization ... See full document