2025 A Strict Comparison Principle for Integro-Differential Hamilton-Jacobi-Bellman Equations on Domains with Boundary Serena Della Corte, Fabian Fuchs, Richard C. Kraaij, and Max Nendel 2025 arXiv Existence of Viscosity Solutions to Abstract Cauchy Problems via Nonlinear Semigroups Fabian Fuchs, and Max Nendel 2025 arXiv 2024 A comparison principle based on couplings of partial integro-differential operators Serena Della Corte, Fabian Fuchs, Richard C. Kraaij, and Max Nendel 2024 arXiv