  In this paper, calculus of variation methods are generalized to find min-max
optimal solution of uncertain dynamical systems with uncertain or certain cost.
First, a new form of Euler-Lagrange conditions for uncertain systems is
presented. Then several cases are indicated where final condition can be
specified or free. Also necessary conditions are introduced to existence of
min-max optimal solution of the uncertain systems. Finally, efficiency of the
proposed method is verified through some examples.
