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: "recursive descriptions of decoding algorithms and hardware architectures for polar codes"
  Abstract: Polar codes are recursive general concatenated codes. This property motivates a recursive formalization of the known decoding algorithms: Successive Cancellation, Successive Cancellation with Lists and Belief Propagation. This description allows an easy development of the first two algorithms for arbitrary polarizing kernels. Hardware architectures for these decoding algorithms are also described in a recursive way, both for Arikan's standard polar codes and for arbitrary polarizing kernels.

Connected through hyperedge HE-1 (induced by source paper "binary polarization kernels from code decompositions"):
  with members:
    - "binary polar code kernels from code decompositions"
    - "polar codes with mixed kernels"
    - "channel polarization on q ary discrete memoryless channels by arbitrary kernels"
    - "non binary polar codes using reed solomon codes and algebraic geometry codes"
    - "channel polarization a method for constructing capacity achieving codes for symmetric binary input memoryless channels"
    - "polar codes characterization of exponent bounds and constructions"
    - "on the rate of channel polarization"

Connected through hyperedge HE-2 (induced by source paper "polar codes with mixed kernels"):
  with members:
    - "list decoding of polar codes"
    - "binary polar code kernels from code decompositions"
    - "the exponent of a polarizing matrix constructed from the kronecker product"
    - "channel polarization on q ary discrete memoryless channels by arbitrary kernels"
    - "non binary polar codes using reed solomon codes and algebraic geometry codes"
    - "refined rate of channel polarization"
    - "hardware architectures for successive cancellation decoding of polar codes"
    - "performance and construction of polar codes on symmetric binary input memoryless channels"

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)