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: "on sub packetization and access number of capacity achieving pir schemes for mds coded non colluding servers"
  Abstract: Consider the problem of private information retrieval (PIR) over a distributed storage system where M records are stored across N servers by using an [N,K] MDS code. For simplicity, this problem is usually referred as the coded PIR problem. In 2016, Banawan and Ulukus designed the first capacity-achieving coded PIR scheme with sub-packetization KNM and access number MKNM, where capacity characterizes the minimal download size for retrieving per unit of data, and sub-packetization and access number are two metrics closely related to implementation complexity. In this paper, we focus on minimizing the sub-packetization and the access number for linear capacity-achieving coded PIR schemes. We first determine the lower bounds on sub-packetization and access number, which are KnM−1 and MKnM−1, respectively, in the nontrivial cases (i.e., N >K ≥ 1 and M >1), where n= N/gcd(N,K). We then design a general linear capacity-achieving coded PIR scheme to simultaneously attain these two bounds, implying tightness of both bounds.

Connected through hyperedge HE-1 (induced by source paper "towards practical private information retrieval from mds array codes"):
  with members:
    - "a new capacity achieving private information retrieval scheme with almost optimal file length for coded servers"
    - "on the pir capacity of msr codes"
    - "breaking the mds pir capacity barrier via joint storage coding"
    - "a generic transformation to enable optimal repair in mds codes for distributed storage systems"
    - "capacity achieving private information retrieval codes with optimal message size and upload cost"
    - "private information retrieval from mds coded data in distributed storage systems"
    - "private information retrieval schemes with regenerating codes"
    - "mds code constructions with small sub packetization and near optimal repair bandwidth"

Connected through hyperedge HE-2 (induced by source paper "private information retrieval from mds array codes with near optimal repair bandwidth"):
  with members:
    - "a new capacity achieving private information retrieval scheme with almost optimal file length for coded servers"
    - "capacity achieving private information retrieval codes from mds coded databases with minimum message size"
    - "a generic transformation to enable optimal repair in mds codes for distributed storage systems"
    - "capacity achieving private information retrieval codes with optimal message size and upload cost"
    - "private information retrieval from mds coded data in distributed storage systems"
    - "mds code constructions with small sub packetization and near optimal repair bandwidth"
    - "bandwidth adaptive error resilient mbr exact repair regenerating codes"
    - "t private information retrieval schemes using transitive codes"

Connected through hyperedge HE-3 (induced by source paper "breaking the mds pir capacity barrier via joint storage coding"):
  with members:
    - "the capacity of private information retrieval from heterogeneous uncoded caching databases"
    - "an optimal iterative placement algorithm for pir from heterogeneous storage constrained databases"
    - "capacity achieving private information retrieval codes from mds coded databases with minimum message size"
    - "the capacity of private information retrieval from uncoded storage constrained databases"
    - "batch and pir codes and their connections to locally repairable codes"
    - "on the fundamental limit of private information retrieval for coded distributed storage"
    - "private information retrieval from mds coded data in distributed storage systems"
    - "private information retrieval from mds coded data with colluding servers settling a conjecture by freij hollanti et al"

Connected through hyperedge HE-4 (induced by source paper "a new capacity achieving private information retrieval scheme with almost optimal file length for coded servers"):
  with members:
    - "placement delivery array design through strong edge coloring of bipartite graphs"
    - "capacity achieving private information retrieval codes with optimal message size and upload cost"
    - "private information retrieval from mds coded data in distributed storage systems"
    - "on the placement delivery array design for centralized coded caching scheme"
    - "the capacity of private information retrieval"
    - "the capacity of private information retrieval from coded databases"
    - "optimal download cost of private information retrieval for arbitrary message length"
    - "finite length analysis of caching aided coded multicasting"

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)