An Index for Lifting Social Distancing During the COVID-19 Pandemic: Algorithm Recommendation for Lifting Social Distancing

BackgroundImplementing and lifting social distancing (LSD) is an urgent global issue during the COVID-19 pandemic, particularly when the travel ban is lifted to revive international businesses and economies.However, when and whether LSD can be considered is subject to the spread of SARS-CoV-2, the recovery rate, and the case-fatality rate.It is imp

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Viscosity solutions of fully nonlinear functional parabolic PDE

By the technique of coupled solutions, Collections the notion of viscosity solutions is extended to fully nonlinear retarded parabolic equations.Such equations involve many models arising from optimal control theory, Patches economy and finance, biology, and so forth.The comparison principle is shown.Then the existence and uniqueness are establishe

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