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: "the approximate capacity region of the gaussian z interference channel with conferencing encoders"
  Abstract: A two-user Gaussian Z-Interference Channel (GZIC) is considered, in which encoders are connected through noiseless links with finite capacities. In this setting, prior to each transmission block the encoders communicate with each other over the cooperative links. The capacity region and the sum-capacity of the channel are characterized within 1.71 bits per user and 2 bits in total, respectively. It is also established that properly sharing the total limited cooperation capacity between the cooperative links may enhance the achievable region, even when compared to the case of unidirectional transmitter cooperation with infinite cooperation capacity. To obtain the results, genie-aided upper bounds on the sum-capacity and cut-set bounds on the individual rates are compared with the achievable rate region. In the interference-limited regime, the achievable scheme enjoys a simple type of Han-Kobayashi signaling, together with the zero-forcing, and basic relaying techniques. In the noise-limited regime, it is shown that treating interference as noise achieves the capacity region up to a single bit per user.

Connected through hyperedge HE-1 (induced by source paper "on the secrecy capacity region of the 2 user z interference channel with unidirectional transmitter cooperation"):
  with members:
    - "outer bounds on the secrecy capacity region of the 2 user z interference channel with unidirectional transmitter cooperation"
    - "topological interference management through index coding"
    - "secrecy in the 2 user symmetric deterministic interference channel with transmitter cooperation"
    - "multiaccess channel with partially cooperating encoders and security constraints"
    - "interference alignment for secrecy"
    - "interference assisted secret communication"
    - "interference channels with source cooperation"
    - "interference mitigation through limited transmitter cooperation"

Connected through hyperedge HE-2 (induced by source paper "outer bounds on the secrecy capacity region of the 2 user z interference channel with unidirectional transmitter cooperation"):
  with members:
    - "on the secrecy capacity region of the 2 user z interference channel with unidirectional transmitter cooperation"
    - "secrecy in the 2 user symmetric deterministic interference channel with transmitter cooperation"
    - "multiaccess channel with partially cooperating encoders and security constraints"
    - "interference alignment for secrecy"
    - "interference assisted secret communication"
    - "interference channels with source cooperation"
    - "interference mitigation through limited transmitter cooperation"
    - "gaussian z interference channel with a relay link achievability region and asymptotic sum capacity"

Connected through hyperedge HE-3 (induced by source paper "cellular interference alignment"):
  with members:
    - "cellular interference alignment omni directional antennas and asymmetric configurations"
    - "feasibility of interference alignment for the mimo interference channel"
    - "real interference alignment exploiting the potential of single antenna systems"
    - "interference channels with half duplex source cooperation"
    - "cognitive wyner networks with clustered decoding"
    - "flexible backhaul design and degrees of freedom for linear interference networks"
    - "on the optimality of treating interference as noise"
    - "degrees of freedom of mimo cellular networks decomposition and linear beamforming design"

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)