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: "cycle structure of permutation functions over finite fields and their applications"
  Abstract: In this work we establish some new interleavers based on #R##N#permutation functions. The inverses of these interleavers are #R##N#known over a finite field $\mathbb F_q$. For the first time #R##N#Mobius and Redei functions are used to give new #R##N#deterministic interleavers. Furthermore we employ Skolem sequences#R##N#in order to find new interleavers with known cycle structure.#R##N#In the case of Redei functions an exact formula for the inverse #R##N#function is derived. The cycle structure of Redei functions is #R##N#also investigated. The self-inverse and non-self-inverse versions #R##N#of these permutation functions can be used to construct new #R##N#interleavers.

Connected through hyperedge HE-1 (induced by source paper "turbo lattices construction and error decoding performance"):
  with members:
    - "practical encoders and decoders for euclidean codes from barnes wall lattices"
    - "low density lattice codes"
    - "on quasi cyclic interleavers for parallel turbo 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)