Multisummability of formal power series solutions of nonlinear partial differential equations in complex domains

Let (u) over cap (t,x) = Sigma(infinity)(n=1) u(n)(x)t(n), (t,x) is an element of C x C-d, be a formal power series solution of a nonlinear partial differential equation. We study multisummability of (u) over cap (t,x). This paper is a continuation of [S. (O) over bar uchi, Multisummability of formal solutions of some linear partial differential equations, J. Differential Equations 185 (2002), 513-549], where linear partial differential equations were treated.