Electronic Journal of Differential Equations, Vol. 2011 (2011), No. 92, pp. 1-30. Title: Time-dependent domains for nonlinear evolution operators and partial differential equations Author: Chin-Yuan Lin (National Central Univ., Chung-Li, Taiwan) Abstract: This article concerns the nonlinear evolution equation $$\displaylines{ \frac{du(t)}{dt} \in A(t)u(t), \quad 0 \leq s < t < T, \cr u(s) = u_0 }$$ in a real Banach space X, where the nonlinear, time-dependent, and multi-valued operator $ A(t) : D(A(t)) \subset X \to X$ has a time-dependent domain D(A(t)). It will be shown that, under certain assumptions on A(t), the equation has a strong solution. Illustrations are given of solving quasi-linear partial differential equations of parabolic type with time-dependent boundary conditions. Those partial differential equations are studied to a large extent. Submitted June 15, 2011. Published July 18, 2011. Math Subject Classifications: 47B44, 47H20, 35J25, 35K20. Key Words: Dissipative operators; evolution equations; parabolic and elliptic equations.