Abstract
The global equi-continuity estimate on $$L^p$$ -viscosity solutions of bilateral obstacle problems with unbounded ingredients is established when obstacles are merely continuous. The existence of $$L^p$$ -viscosity solutions is established via an approximation of given data. The local Holder continuity estimate on the first derivative of $$L^p$$ -viscosity solutions is shown when the obstacles belong to $$C^{1,\beta }$$ , and $$p>n$$ .
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