linear relaxation, semidefinite relaxation, lift-and-project, cut polytope, stable set polytope
Graphs and linear algebra (matrices, eigenvalues, etc.) (msc 05C50), Hermitian, skew-Hermitian, and related matrices (msc 15B57), Special polytopes (linear programming, centrally symmetric, etc.) (msc 52B12), Semidefinite programming (msc 90C22), Combinatorial optimization (msc 90C27)
Logistics (theme 3)
SIAM Journal on Optimization
Networks and Optimization

Laurent, M. (2001). Tighter linear and semidefinite relaxations for max-cut based on the Lov\'asz-Schrijver lift-and-project procedure. SIAM Journal on Optimization, 12(2), 345–375.