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: "deterministic random walks for rapidly mixing chains"
  Abstract: The rotor-router model is a deterministic process analogous to a simple random walk on a graph. This paper is concerned with a generalized model, functional-router model, which imitates a Markov chain possibly containing irrational transition probabilities. We investigate the discrepancy of the number of tokens at a single vertex between the functional-router model and its corresponding Markov chain, and give an upper bound in terms of the mixing time of the Markov chain.

Connected through hyperedge HE-1 (induced by source paper "discrepancy analysis of a new randomized diffusion algorithm for weighted round matrices"):
  with members:
    - "improved analysis of deterministic load balancing schemes"
    - "quasirandom load balancing"
    - "tight bounds for randomized load balancing on arbitrary network topologies"

Connected through hyperedge HE-2 (induced by source paper "the cover time of deterministic random walks for general transition probabilities"):
  with members:
    - "total variation discrepancy of deterministic random walks for ergodic markov chains"
    - "lock in problem for parallel rotor router walks"
    - "improved analysis of deterministic load balancing schemes"
    - "quasirandom load balancing"
    - "the cover time of deterministic random walks"

Connected through hyperedge HE-3 (induced by source paper "total variation discrepancy of deterministic random walks for ergodic markov chains"):
  with members:
    - "lock in problem for parallel rotor router walks"
    - "improved analysis of deterministic load balancing schemes"
    - "quasirandom load balancing"
    - "a deterministic polynomial time approximation scheme for counting knapsack solutions"
    - "polynomial time approximation schemes for knapsack and related counting problems using branching programs"

Connected through hyperedge HE-4 (induced by source paper "improved analysis of deterministic load balancing schemes"):
  with members:
    - "quasirandom load balancing"
    - "tight bounds for randomized load balancing on arbitrary network topologies"
    - "distributed selfish load balancing with weights and speeds"
    - "the cover time of deterministic random walks"

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.DM(Discrete Mathematics)