Infinite horizon backward stochastic Volterra integral equations and discounted control problems. (English) Zbl 1490.60197
Summary: Infinite horizon backward stochastic Volterra integral equations (BSVIEs for short) are investigated. We prove the existence and uniqueness of the adapted M-solution in a weighted \(L^2\)-space. Furthermore, we extend some important known results for finite horizon BSVIEs to the infinite horizon setting. We provide a variation of constant formula for a class of infinite horizon linear BSVIEs and prove a duality principle between a linear (forward) stochastic Volterra integral equation (SVIE for short) and an infinite horizon linear BSVIE in a weighted \(L^2\)-space. As an application, we investigate infinite horizon stochastic control problems for SVIEs with discounted cost functional. We establish both necessary and sufficient conditions for optimality by means of Pontryagin’s maximum principle, where the adjoint equation is described as an infinite horizon BSVIE. These results are applied to discounted control problems for fractional stochastic differential equations and stochastic integro-differential equations.
MSC:
| 60H20 | Stochastic integral equations |
| 45G05 | Singular nonlinear integral equations |
| 49K45 | Optimality conditions for problems involving randomness |
| 49N15 | Duality theory (optimization) |
Keywords:
infinite horizon backward stochastic Volterra integral equation; stochastic Volterra integral equation; duality principle; discounted stochastic controlReferences:
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