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: "optimally gathering two robots"
  Abstract: We present an algorithm that ensures in finite time the gathering of two robots in the non-rigid ASYNC model. To circumvent established impossibility results, we assume robots are equipped with 2-colors lights and are able to measure distances between one another. Aside from its light, a robot has no memory of its past actions, and its protocol is deterministic. Since, in the same model, gathering is impossible when lights have a single color, our solution is optimal with respect to the number of used colors.

Connected through hyperedge HE-1 (induced by source paper "using model checking to formally verify rendezvous algorithms for robots with lights in euclidean space"):
  with members:
    - "optimal rendezvous mathcal l algorithms for asynchronous mobile robots with external lights"
    - "parameterized verification of algorithms for oblivious robots on a ring"
    - "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"
    - "the gathering problem for two oblivious robots with unreliable compasses"

Connected through hyperedge HE-2 (induced by source paper "randomized gathering of asynchronous mobile robots"):
  with members:
    - "optimal rendezvous mathcal l algorithms for asynchronous mobile robots with external lights"
    - "the random bit complexity of mobile robots scattering"

Connected through hyperedge HE-3 (induced by source paper "optimal rendezvous mathcal l algorithms for asynchronous mobile robots with external lights"):
  with members:
    - "gathering problems for autonomous mobile robots with lights"
    - "rendezvous of two robots with visible bits"
    - "the gathering problem for two oblivious robots with unreliable compasses"

Connected through hyperedge HE-4 (induced by source paper "ring exploration with myopic luminous robots"):
  with members:
    - "plane formation by synchronous mobile robots in the three dimensional euclidean space"
    - "optimal grid exploration by asynchronous oblivious robots"

Connected through hyperedge HE-5 (induced by source paper "gathering problems for autonomous mobile robots with lights"):
  with members:
    - "rendezvous of two robots with visible bits"
    - "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)