On the Karush-Kuhn-Tucker reformulation of the bilevel optimization problems on Riemannian manifolds

Jiagen Liao, Zhongping Wan

Abstract


Bilevel programming problems are often reformulated using the Karush-Kuhn-Tucker conditions for the lower level problem resulting in a mathematical program with complementarity constraints (MPCC). First, we present KKT reformulation of the bilevel optimization problems on Riemannian manifolds. Moreover, we show that global or local optimal solutions of the MPCC correspond to global or local optimal solutions of the bilevel problem on the Riemannian manifolds provided the lower level convex problem satisfies the Slaters constraint qualification. We then also show by examples that this correspondence can fail if the Slater’s constraint qualification fails to hold at lower-level convex problem. In addition M- and C-type optimality conditions for the bilevel problem on Riemannian manifolds are given.


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