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: "acyclic preference systems in p2p networks"
  Abstract: In this work we study preference systems natural for the Peer-to-Peer paradigm. Most of them fall in three categories: global, symmetric and complementary. All these systems share an acyclicity property. As a consequence, they admit a stable (or Pareto efficient) configuration, where no participant can collaborate with better partners than their current ones. We analyze the representation of the such preference systems and show that any acyclic system can be represented with a symmetric mark matrix. This gives a method to merge acyclic preference systems and retain the acyclicity. We also consider such properties of the corresponding collaboration graph, as clustering coefficient and diameter. In particular, studying the example of preferences based on real latency measurements, we observe that its stable configuration is a small-world graph.

Connected through hyperedge HE-1 (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"
    - "on treewidth and stable marriage"
    - "how hard is it to satisfy almost all roommates"
    - "balanced stable marriage how close is close enough"
    - "the stable roommates problem with short lists"

Connected through hyperedge HE-2 (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"
    - "on treewidth and stable marriage"
    - "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"

Connected through hyperedge HE-3 (induced by source paper "how hard is it to satisfy almost all roommates"):
  with members:
    - "stable marriage with multi modal preferences"
    - "stable marriage with groups of similar agents"
    - "balanced stable marriage how close is close enough"
    - "the stable roommates problem with short lists"
    - "stable marriage with covering constraints a complete computational trichotomy"
    - "almost optimal cover free families"
    - "linear time constructions of some d restriction problems"
    - "designing fpt algorithms for cut problems using randomized contractions"

Connected through hyperedge HE-4 (induced by source paper "how to group wireless nodes together"):
  with members:
    - "cooperative base station coloring for pair wise multi cell coordination"
    - "a stochastic geometry framework for analyzing pairwise cooperative cellular networks"
    - "analyzing interference from static cellular cooperation using the nearest neighbour model"
    - "spectral efficiency of dynamic coordinated beamforming a stochastic geometry approach"
    - "a tractable model for noncoherent joint transmission base station cooperation"
    - "location aware cross tier coordinated multipoint transmission in two tier cellular networks"
    - "interference coordination random clustering and adaptive limited feedback"
    - "coverage by pairwise base station cooperation under adaptive geometric policies"

Connected through hyperedge HE-5 (induced by source paper "self organizing flows in social networks"):
  with members:
    - "tight bounds for rumor spreading with vertex expansion"
    - "bounded budget connection bbc games or how to make friends and influence people on a budget"
    - "fast construction of nets in low dimensional metrics and their applications"

Connected through hyperedge HE-6 (induced by source paper "stable marriage and roommates problems with restricted edges complexity and approximability"):
  with members:
    - "socially stable matchings in the hospitals residents problem"

Connected through hyperedge HE-7 (induced by source paper "new and simple algorithms for stable flow problems"):
  with members:
    - "complexity of stability in trading networks"
    - "the stable fixtures problem with payments"

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)