Given a graph G = (V,E) with edge weights wij for ij ∈ E and wij = 0 for ij ⁄∈ E, Max-Cut is the problem of finding a bipartition of the nodes V such that the sum of the weights of the edges across the bipartition is maximized. Let n = |V | be the cardinality of V ; we can state Max-Cut as
maximize | ∑ i<jwij | |||||
subject to | x ∈{-1,1}n. |
maximize | xTQx | |||||
subject to | x ∈{0,1}n. |