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: "applications of polymatroid theory to distributed storage systems"
  Abstract: In this paper, a link between polymatroid theory and locally repairable codes (LRCs) is established. The codes considered here are completely general in that they are subsets of $A^n$, where $A$ is an arbitrary finite set. Three classes of LRCs are considered, both with and without availability, and for both information-symbol and all-symbol locality. The parameters and classes of LRCs are generalized to polymatroids, and a general- ized Singelton bound on the parameters for these three classes of polymatroids and LRCs is given. This result generalizes the earlier Singleton-type bounds given for LRCs. Codes achieving these bounds are coined perfect, as opposed to the more common term optimal used earlier, since they might not always exist. Finally, new constructions of perfect linear LRCs are derived from gammoids, which are a special class of matroids. Matroids, for their part, form a subclass of polymatroids and have proven useful in analyzing and constructing linear LRCs.

Connected through hyperedge HE-1 (induced by source paper "batch and pir codes and their connections to locally repairable codes"):
  with members:
    - "on private information retrieval array codes"
    - "lower bound on the redundancy of pir codes"
    - "pir array codes with optimal pir rate"
    - "cooperative local repair in distributed storage"
    - "pir with low storage overhead coding instead of replication"
    - "private information retrieval for coded storage"
    - "bounds for batch codes with restricted query size"
    - "repair locality with multiple erasure tolerance"

Connected through hyperedge HE-2 (induced by source paper "matroid theory and storage codes bounds and constructions"):
  with members:
    - "locally recoverable codes from algebraic curves and surfaces"
    - "improved singleton type bounds for locally repairable codes"
    - "constructions and properties of linear locally repairable codes"
    - "codes with hierarchical locality"
    - "optimal binary locally repairable codes via anticodes"
    - "pir with low storage overhead coding instead of replication"
    - "bounds for batch codes with restricted query size"
    - "bounds on the parameters of locally recoverable codes"

Connected through hyperedge HE-3 (induced by source paper "bounds on the maximal minimum distance of linear locally repairable codes"):
  with members:
    - "cooperative local repair in distributed storage"
    - "bounds on the parameters of locally recoverable codes"
    - "locally repairable codes and matroid theory"
    - "a family of optimal locally recoverable codes"
    - "optimal locally repairable linear codes"
    - "optimal locally repairable codes via rank metric codes"
    - "an upper bound on the size of locally recoverable codes"
    - "optimal locally repairable codes and connections to matroid theory"

Connected through hyperedge HE-4 (induced by source paper "improved singleton type bounds for locally repairable codes"):
  with members:
    - "locally repairable codes and matroid theory"
    - "a family of optimal locally recoverable codes"
    - "optimal locally repairable linear codes"
    - "optimal locally repairable codes via rank metric codes"
    - "optimal locally repairable codes and connections to matroid theory"
    - "optimal linear codes with a local error correction property"
    - "locally repairable codes"

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.IT(Information Theory)