human: Given a hyperedge-centered hypergraph: <hypergraph>, where the center hyperedge is induced by one source paper and its member nodes are the cited papers.

Details of the hypergraph:
Center hyperedge (induced by source paper "integrality gaps for bounded color matchings"):
  Abstract: We investigate the performance of two common lift-and-project techniques, the Sherali-Adams (SA) and the Balas, Ceria and Cornu\'ejols (BCC) hierarchies, on the natural linear relaxation of the Bounded Color Matching polyhedron and generalizations. We prove the following unconditional inapproximability results: even a large family of linear programs, generated by an asymptotically linear number of rounds of the Sherali-Adams hierarchy or a linear number of rounds of the BCC hierarchy, is not enough to improve the integrality gap of the natural LP relaxation even in bipartite graphs. We complement these results by showing in a non-algorithmic way that if we exclude certain sub-structures from our instance graphs, then the integrality gap of the natural linear formulation improves.

Includes members:
  Member "a birthday repetition theorem and complexity of approximating dense csps":
    also connected through other hyperedges:
      - Hyperedge HE-1 (induced by source paper "parameterized inapproximability for steiner orientation by gap amplification")
  Member "lift and round to improve weighted completion time on unrelated machines":
    also connected through other hyperedges:
      - Hyperedge HE-2 (induced by source paper "weighted completion time minimization for unrelated machines via iterative fair contention resolution")
  Member "generalized hypergraph matching via iterated packing and local ratio":
    also connected through other hyperedges:
      - Hyperedge HE-3 (induced by source paper "approximate multi matroid intersection via iterative refinement")
  Member "complexity results for rainbow matchings":
    also connected through other hyperedges:
      - Hyperedge HE-4 (induced by source paper "keeping your friends close land allocation with friends")
  Member "on integrality ratios for asymmetric tsp in the sherali adams hierarchy":
    also connected through other hyperedges:
      (none)
  Member "sparsest cut on bounded treewidth graphs algorithms and hardness results":
    also connected through other hyperedges:
      - Hyperedge HE-5 (induced by source paper "on the parameterized complexity of sparsest cut and small set expansion problems")
  Member "iterative packing for demand and hypergraph matching":
    also connected through other hyperedges:
      - Hyperedge HE-6 (induced by source paper "algorithms to approximate column sparse packing problems")
  Member "approximating sparsest cut in graphs of bounded treewidth":
    also connected through other hyperedges:
      - Hyperedge HE-7 (induced by source paper "a 1 epsilon approximation for makespan scheduling with precedence constraints using lp hierarchies")

Question: Please tell me which class the source paper belongs to. The 40 classes are: cs.NA(Numerical Analysis), cs.MM(Multimedia), cs.LO(Logic in Computer Science), cs.CY(Computers and Society), cs.CR(Cryptography and Security), cs.DC(Distributed, Parallel, and Cluster Computing), cs.HC(Human-Computer Interaction), cs.CE(Computational Engineering, Finance, and Science), cs.NI(Networking and Internet Architecture), cs.CC(Computational Complexity), cs.AI(Artificial Intelligence), cs.MA(Multiagent Systems), cs.GL(General Literature), cs.NE(Neural and Evolutionary Computing), cs.SC(Symbolic Computation), cs.AR(Hardware Architecture), cs.CV(Computer Vision and Pattern Recognition), cs.GR(Graphics), cs.ET(Emerging Technologies), cs.SY(Systems and Control), cs.CG(Computational Geometry), cs.OH(Other Computer Science), cs.PL(Programming Languages), cs.SE(Software Engineering), cs.LG(Machine Learning), cs.SD(Sound), cs.SI(Social and Information Networks), cs.RO(Robotics), cs.IT(Information Theory), cs.PF(Performance), cs.CL(Computation and Language), cs.IR(Information Retrieval), cs.MS(Mathematical Software), cs.FL(Formal Languages and Automata Theory), cs.DS(Data Structures and Algorithms), cs.OS(Operating Systems), cs.GT(Computer Science and Game Theory), cs.DB(Databases), cs.DL(Digital Libraries), cs.DM(Discrete Mathematics). Directly output the class name.

gpt: cs.DM(Discrete Mathematics)