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: "on treewidth and stable marriage"
  Abstract: Stable Marriage is a fundamental problem to both computer science and economics. Four well-known NP-hard optimization versions of this problem are the Sex-Equal Stable Marriage (SESM), Balanced Stable Marriage (BSM), max-Stable Marriage with Ties (max-SMT) and min-Stable Marriage with Ties (min-SMT) problems. In this paper, we analyze these problems from the viewpoint of Parameterized Complexity. We conduct the first study of these problems with respect to the parameter treewidth. First, we study the treewidth $\mathtt{tw}$ of the primal graph. We establish that all four problems are W[1]-hard. In particular, while it is easy to show that all four problems admit algorithms that run in time $n^{O(\mathtt{tw})}$, we prove that all of these algorithms are likely to be essentially optimal. Next, we study the treewidth $\mathtt{tw}$ of the rotation digraph. In this context, the max-SMT and min-SMT are not defined. For both SESM and BSM, we design (non-trivial) algorithms that run in time $2^{\mathtt{tw}}n^{O(1)}$. Then, for both SESM and BSM, we also prove that unless SETH is false, algorithms that run in time $(2-\epsilon)^{\mathtt{tw}}n^{O(1)}$ do not exist for any fixed $\epsilon>0$. We thus present a comprehensive, complete picture of the behavior of central optimization versions of Stable Marriage with respect to treewidth.

Connected through hyperedge HE-1 (induced by source paper "stable matchings with diversity constraints affirmative action is beyond np"):
  with members:
    - "from matching with diversity constraints to matching with regional quotas"
    - "parameterized complexity of stable roommates with ties and incomplete lists through the lens of graph parameters"
    - "diverse weighted bipartite b matching"

Connected through hyperedge HE-2 (induced by source paper "computational complexity of stable marriage and stable roommates and their variants"):
  with members:
    - "stable roommates with narcissistic single peaked and single crossing preferences"
    - "matchings under preferences strength of stability and trade offs"
    - "stable marriage with multi modal preferences"
    - "popular matchings and limits to tractability"
    - "how hard is it to satisfy almost all roommates"
    - "balanced stable marriage how close is close enough"
    - "the stable roommates problem with short lists"
    - "acyclic preference systems in p2p networks"

Connected through hyperedge HE-3 (induced by source paper "parameterized complexity of stable roommates with ties and incomplete lists through the lens of graph parameters"):
  with members:
    - "sat encodings for treecut width and treedepth"
    - "stable marriage with multi modal preferences"
    - "stable marriage with groups of similar agents"
    - "how hard is it to satisfy almost all roommates"
    - "the stable roommates problem with short lists"
    - "stable marriage with covering constraints a complete computational trichotomy"
    - "acyclic preference systems in p2p networks"

Connected through hyperedge HE-4 (induced by source paper "stable marriage with groups of similar agents"):
  with members:
    - "balanced stable marriage how close is close enough"
    - "stable marriage with covering constraints a complete computational trichotomy"
    - "parameterized integer quadratic programming variables and coefficients"
    - "the complexity of approximately counting stable roommate assignments"
    - "the complexity of approximately counting stable matchings"
    - "complexity of coalition structure generation"

Connected through hyperedge HE-5 (induced by source paper "balanced stable marriage how close is close enough"):
  with members:
    - "stable marriage with groups of similar agents"
    - "how hard is it to satisfy almost all roommates"
    - "on parameterized complexity of group activity selection problems on social networks"
    - "group activity selection on social networks"
    - "stable marriage with covering constraints a complete computational trichotomy"
    - "raising the bar for vertex cover fixed parameter tractability above a higher guarantee"
    - "parameterized algorithmics for computational social choice nine research challenges"
    - "faster parameterized algorithms using linear programming"

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.DS(Data Structures and Algorithms)