Comparison Theorem for Viability Kernels via Conic Preorders

In natural resource management, decision-makers often aim at maintaining thestate of the system within a desirable set for all times.For instance, fisheries management procedures include keeping thespawning stock biomass over a critical threshold.Another example is given by the peak control of an epidemic outbreakthat encompasses maintaining thenumber of infected individuals below medical treatment capacities.In mathematical terms, one controls a dynamical system.Then, keeping the state of the system within a desirable set for all times is possible when the initial state belongs to the so-called viabilitykernel. We introduce the notion of conic quasimonotonicity reducibility.With this property, we provide a comparison theorem by inclusion between two viabilitykernels, corresponding to two control systems in the infinite horizon case. Wealso derive conditions for equality. We illustrate the method with a model for thebiocontrol of a vector-transmitted epidemic.

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