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: "z4 linear perfect codes"
  Abstract: For every n = 2 k ≥ 16 there exist exactly ⌊(k + 1)/2⌋ mutually nonequivalent Z4-linear extended perfect codes with distance 4. All these codes have different ranks. Certain of known nonlinear binary codes such as Kerdock, Preparata, Goethals, Delsarte-Goethals codes can be represented, using some mapping Z4 → Z 2 2 (in this

Connected through hyperedge HE-1 (induced by source paper "on the automorphism groups of the z2z4 linear 1 perfect and preparata like codes"):
  with members:
    - "permutation decoding of z2z4 linear codes"

Connected through hyperedge HE-2 (induced by source paper "classification of the z_ 2 z_ 4 linear hadamard codes and their automorphism groups"):
  with members:
    - "z4 linear hadamard and extended perfect codes"

Connected through hyperedge HE-3 (induced by source paper "propelinear 1 perfect codes from quadratic functions"):
  with members:
    - "the perfect binary one error correcting codes of length 15 part ii properties"

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)