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: "certified universal gathering in r 2 for oblivious mobile robots"
  Abstract: We present a unified formal framework for expressing mobile robots models, protocols, and proofs, and devise a protocol design/proof methodology dedicated to mobile robots that takes advantage of this formal framework. As a case study, we present the first formally certified protocol for oblivious mobile robots evolving in a two-dimensional Euclidean space. In more details, we provide a new algorithm for the problem of universal gathering mobile oblivious robots (that is, starting from any initial configuration that is not bivalent, using any number of robots, the robots reach in a finite number of steps the same position, not known beforehand) without relying on a common orientation nor chirality. We give very strong guaranties on the correctness of our algorithm by proving formally that it is correct, using the COQ proof assistant. This result demonstrates both the effectiveness of the approach to obtain new algorithms that use as few assumptions as necessary, and its manageability since the amount of developed code remains human readable.

Connected through hyperedge HE-1 (induced by source paper "optimally gathering two robots"):
  with members:
    - "parameterized verification of algorithms for oblivious robots on a ring"
    - "optimal asynchronous rendezvous for mobile robots with lights"
    - "on the synthesis of mobile robots algorithms the case of ring gathering"
    - "fault and byzantine tolerant self stabilizing mobile robots gathering feasibility study"
    - "certified impossibility results for byzantine tolerant mobile robots"
    - "rendezvous of two robots with visible bits"
    - "optimal grid exploration by asynchronous oblivious robots"

Connected through hyperedge HE-2 (induced by source paper "parameterized verification of algorithms for oblivious robots on a ring"):
  with members:
    - "on the synthesis of mobile robots algorithms the case of ring gathering"
    - "certified impossibility results for byzantine tolerant mobile robots"
    - "optimal grid exploration by asynchronous oblivious robots"

Connected through hyperedge HE-3 (induced by source paper "gathering in the plane of location aware robots in the presence of spies"):
  with members:
    - "search on a line by byzantine robots"
    - "asymptotically optimal gathering on a grid"
    - "the gathering problem for two oblivious robots with unreliable compasses"

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.DC(Distributed, Parallel, and Cluster Computing)