human: Given a node-centered hypergraph: <hypergraph>, where nodes represent papers and hyperedges represent sets of papers co-cited by a source paper.

Details of the hypergraph:
Center node: "multiset ordering constraints"
  Abstract: We identify a new and important global (or non-binary) constraint. This constraint ensures that the values taken by two vectors of variables, when viewed as multisets, are ordered. This constraint is useful for a number of different applications including breaking symmetry and fuzzy constraint satisfaction. We propose and implement an efficient linear time algorithm for enforcing generalised arc consistency on such a multiset ordering constraint. Experimental results on several problem domains show considerable promise.

Connected through hyperedge HE-1 (induced by source paper "a commentary on breaking row and column symmetries in matrix models"):
  with members:
    - "breaking symmetry with different orderings"
    - "on the complexity and completeness of static constraints for breaking row and column symmetry"
    - "filtering algorithms for the multiset ordering constraint"
    - "slide a useful special case of the cardpath constraint"

Connected through hyperedge HE-2 (induced by source paper "breaking symmetry with different orderings"):
  with members:
    - "on the complexity and completeness of static constraints for breaking row and column symmetry"
    - "breaking value symmetry"
    - "combining symmetry breaking and global constraints"
    - "symmetries of symmetry breaking constraints"

Connected through hyperedge HE-3 (induced by source paper "symmetry breaking constraints recent results"):
  with members:
    - "the alldifferent constraint with precedences"
    - "on the complexity and completeness of static constraints for breaking row and column symmetry"
    - "breaking value symmetry"
    - "combining symmetry breaking and global constraints"
    - "symmetries of symmetry breaking constraints"

Connected through hyperedge HE-4 (induced by source paper "on the complexity and completeness of static constraints for breaking row and column symmetry"):
  with members:
    - "breaking value symmetry"
    - "the complexity of reasoning with global constraints"
    - "breaking generator symmetry"

Question: Please tell me which class the center node 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.AI(Artificial Intelligence)