A nonlinear complementarity problem in mathematical programming in Hilbert space
Sribatsa Nanda, Sudarsan Nanda · Bulletin of the Australian Mathematical Society · 1979
In this paper we prove the following existence and uniqueness theorem for the nonlinear complementarity problem by using the Banach contraction principle. If T: K → H is strongly monotone and lipschitzian with k2 < 2c < k2+1, then there is a unique y ∈ K, such that Ty ∈ K* and (Ty, y) = 0 where H is a Hilbert space, K is a closed convex cone in H, and K* the polar cone.