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: "mds and self dual codes over rings"
  Abstract: In this paper we give the structure of constacyclic codes over formal power series and chain rings. We also present necessary and sufficient conditions on the existence of MDS codes over principal ideal rings. These results allow for the construction of infinite families of MDS self-dual codes over finite chain rings, formal power series and principal ideal rings.

Connected through hyperedge HE-1 (induced by source paper "primitive idempotents and constacyclic codes over finite chain rings"):
  with members:
    - "some constacyclic codes over finite chain rings"

Connected through hyperedge HE-2 (induced by source paper "constacyclic codes over f_q u f_q v f_q u v f_q"):
  with members:
    - "constacyclic codes over finite principal ideal rings"
    - "skew cyclic codes over f_q u f_q v f_q uv f_q"
    - "constacyclic codes over f_p vf_p"

Connected through hyperedge HE-3 (induced by source paper "constacyclic codes over finite principal ideal rings"):
  with members:
    - "some constacyclic codes over finite chain rings"

Connected through hyperedge HE-4 (induced by source paper "some constacyclic codes over finite chain rings"):
  with members:
    - "on the hamming weight of repeated root cyclic and negacyclic codes over galois rings"

Connected through hyperedge HE-5 (induced by source paper "construction of cyclic codes over mathbb f _2 u mathbb f _2 for dna computing"):
  with members:
    - "information storage and retrieval using macromolecules as storage media"

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)