Viscosity solutions of path-dependent integro-differential equations

We extend the notion of viscosity solutions for path-dependent PDEs introduced by Ekren et al. (2014) to path-dependent integro-differential equations and establish well-posedness, i.e., existence, uniqueness, and stability, for a class of semilinear path-dependent integro-differential equations with uniformly continuous data. Closely related are non-Markovian backward SDEs with jumps, which provide a probabilistic representation for solutions of our equations. The results are potentially useful for applications using non-Markovian jump–diffusion models.