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: "when can helper node selection improve regenerating codes part i graph based analysis"
  Abstract: Regenerating codes (RCs) can significantly reduce the repair-bandwidth of distributed storage networks. Initially, the analysis of RCs was based on the assumption that during the repair process, the newcomer does not distinguish (among all surviving nodes) which nodes to access, i.e., the newcomer is oblivious to the set of helpers being used. Such a scheme is termed the blind helper selection (BHS) scheme. Nonetheless, it is intuitive in practice that the newcomer should choose to access only those "good" helpers. In this two-part paper, a new characterization of the effect of choosing the helper nodes in terms of the storage-bandwidth tradeoff is given. Specifically, the answer to the following fundamental question is provided: Under what condition does proactively choosing the helper nodes improve the storage-bandwidth tradeoff? #R##N#Through a graph-based analysis, this Part I paper answers this question by providing a necessary and sufficient condition under which optimally choosing good helpers strictly improves the storage-bandwidth tradeoff. A low-complexity helper selection solution, termed the family helper selection (FHS) scheme, is proposed and the corresponding storage/repair-bandwidth curve is characterized. This Part I paper also proves that under some design parameters, the FHS scheme is indeed optimal among all helper selection schemes. In the Part II paper, an explicit construction of an exact-repair code is proposed that achieves the minimum-bandwidth-regenerating (MBR) point of the FHS scheme. The new exact-repair code can be viewed as a generalization of the existing fractional repetition code.

Connected through hyperedge HE-1 (induced by source paper "explicit constructions of optimal access mds codes with nearly optimal sub packetization"):
  with members:
    - "optimal repair of reed solomon codes achieving the cut set bound"
    - "when can helper node selection improve regenerating codes part ii an explicit exact repair code construction"
    - "progress on high rate msr codes enabling arbitrary number of helper nodes"
    - "minimum storage regenerating codes for all parameters"
    - "an explicit coupled layer construction of a high rate msr code with low sub packetization level small field size and all node repair"
    - "explicit constructions of high rate mds array codes with optimal repair bandwidth"
    - "a high rate msr code with polynomial sub packetization level"
    - "repairing reed solomon codes"

Connected through hyperedge HE-2 (induced by source paper "locally repairable regenerating code constructions"):
  with members:
    - "when can helper node selection improve regenerating codes part ii an explicit exact repair code construction"
    - "when locally repairable codes meet regenerating codes what if some helpers are unavailable"
    - "locally repairable regenerating codes node unavailability and the insufficiency of stationary local repair"
    - "optimal locally repairable and secure codes for distributed storage systems"

Connected through hyperedge HE-3 (induced by source paper "when locally repairable codes meet regenerating codes what if some helpers are unavailable"):
  with members:
    - "when can helper node selection improve regenerating codes part ii an explicit exact repair code construction"
    - "when and by how much can helper node selection improve regenerating codes"
    - "optimal locally repairable and secure codes for distributed storage systems"
    - "characterizing the rate region of the 4 3 3 exact repair regenerating codes"
    - "replication based storage systems with local repair"
    - "locally repairable codes with multiple repair alternatives"
    - "explicit mbr all symbol locality codes"
    - "distributed storage codes with repair by transfer and nonachievability of interior points on the storage bandwidth tradeoff"

Connected through hyperedge HE-4 (induced by source paper "locally repairable regenerating codes node unavailability and the insufficiency of stationary local repair"):
  with members:
    - "when can helper node selection improve regenerating codes part ii an explicit exact repair code construction"
    - "locally repairable regenerating code constructions"
    - "optimal locally repairable and secure codes for distributed storage systems"
    - "characterizing the rate region of the 4 3 3 exact repair regenerating codes"
    - "locally repairable codes with multiple repair alternatives"
    - "explicit mbr all symbol locality codes"
    - "distributed storage codes with repair by transfer and nonachievability of interior points on the storage bandwidth tradeoff"
    - "optimal linear codes with a local error correction property"

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)