Condition to Keep Susceptibles Positive

Available identifiers

MaRDI QIDQ6674278

positive solution constraint

Description

Necessary and sufficient condition to ensure that 𝑆ₙ, is positive for all initial conditions (and Iₙ < N). Implies that the time step At must be less than the average time required for a successful contact.

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Defining Formula: $\alpha \Delta t\le 1$

$\Delta t$ symbol represents Time Step

$\alpha$ symbol represents Contact Rate

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