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: "static and expanding grid coverage with ant robots complexity results"
  Abstract: In this paper we study the strengths and limitations of collaborative teams of simple agents. In particular, we discuss the efficient use of "ant robots" for covering a connected region on the Z^{2} grid, whose area is unknown in advance, and which expands at a given rate, where $n$ is the initial size of the connected region. #R##N#We show that regardless of the algorithm used, and the robots' hardware and software specifications, the minimal number of robots required in order for such coverage to be possible is \Omega({\sqrt{n}}). #R##N#In addition, we show that when the region expands at a sufficiently slow rate, a team of \Theta(\sqrt{n}) robots could cover it in at most O(n^{2} \ln n) time. #R##N#This completion time can even be achieved by myopic robots, with no ability to directly communicate with each other, and where each robot is equipped with a memory of size O(1) bits w.r.t the size of the region (therefore, the robots cannot maintain maps of the terrain, nor plan complete paths). #R##N#Regarding the coverage of non-expanding regions in the grid, we improve the current best known result of O(n^{2}) by demonstrating an algorithm that guarantees such a coverage with completion time of O(\frac{1}{k} n^{1.5} + n) in the worst case, and faster for shapes of perimeter length which is shorter than O(n).

Connected through hyperedge HE-1 (induced by source paper "optimal dynamic coverage infrastructure for large scale fleets of reconnaissance uavs"):
  with members:
    - "the cooperative cleaners problem in stochastic dynamic environments"
    - "incremental learning with accuracy prediction of social and individual properties from mobile phone data"
    - "incremental deployment of network monitors based on group betweenness centrality"

Connected through hyperedge HE-2 (induced by source paper "ride sharing and dynamic networks analysis"):
  with members:
    - "optimal dynamic coverage infrastructure for large scale fleets of reconnaissance uavs"
    - "predictive positioning and quality of service ridesharing for campus mobility on demand systems"
    - "human collective intelligence as distributed bayesian inference"
    - "an analysis of issues against the adoption of dynamic carpooling"
    - "the cooperative cleaners problem in stochastic dynamic environments"
    - "incremental learning with accuracy prediction of social and individual properties from mobile phone data"

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.MA(Multiagent Systems)