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 gaussian multiple access diamond channel"
  Abstract: In this paper, we study the capacity of the diamond channel. We focus on the special case where the channel between the source node and the two relay nodes are two separate links with finite capacities and the link from the two relay nodes to the destination node is a Gaussian multiple access channel. We call this model the Gaussian multiple access diamond channel. We first propose an upper bound on the capacity. This upper bound is a single-letterization of an $n$-letter upper bound proposed by Traskov and Kramer, and is tighter than the cut-set bound. As for the lower bound, we propose an achievability scheme based on sending correlated codes through the multiple access channel with superposition structure. We then specialize this achievable rate to the Gaussian multiple access diamond channel. Noting the similarity between the upper and lower bounds, we provide sufficient and necessary conditions that a Gaussian multiple access diamond channel has to satisfy such that the proposed upper and lower bounds meet. Thus, for a Gaussian multiple access diamond channel that satisfies these conditions, we have found its capacity.

Connected through hyperedge HE-1 (induced by source paper "generalized compression strategy for the downlink cloud radio access network"):
  with members:
    - "hybrid data sharing and compression strategy for downlink cloud radio access network"
    - "on the optimal fronthaul compression and decoding strategies for uplink cloud radio access networks"
    - "an uplink downlink duality for cloud radio access network"
    - "on achievability for downlink cloud radio access networks with base station cooperation"
    - "cloud radio access network virtualizing wireless access for dense heterogeneous systems"
    - "distributed decode forward for relay networks"
    - "sparse beamforming and user centric clustering for downlink cloud radio access network"
    - "joint precoding and multivariate backhaul compression for the downlink of cloud radio access networks"

Connected through hyperedge HE-2 (induced by source paper "capacity bounds on the downlink of symmetric multi relay single receiver c ran networks"):
  with members:
    - "on achievability for downlink cloud radio access networks with base station cooperation"
    - "capacity bounds for diamond networks with an orthogonal broadcast channel"
    - "fronthaul constrained cloud radio access networks insights and challenges"
    - "secure degrees of freedom of the gaussian diamond wiretap channel"
    - "capacity bounds for a class of diamond networks"
    - "sparse beamforming and user centric clustering for downlink cloud radio access network"
    - "an information theoretic approach to secret sharing"
    - "is non unique decoding necessary"

Connected through hyperedge HE-3 (induced by source paper "on achievability for downlink cloud radio access networks with base station cooperation"):
  with members:
    - "fourier motzkin elimination software for information theoretic inequalities"
    - "recent advances in cloud radio access networks system architectures key techniques and open issues"
    - "capacity bounds for diamond networks with an orthogonal broadcast channel"
    - "cloud radio access network virtualizing wireless access for dense heterogeneous systems"
    - "distributed decode forward for relay networks"
    - "sparse beamforming and user centric clustering for downlink cloud radio access network"
    - "joint precoding and multivariate backhaul compression for the downlink of cloud radio access networks"
    - "compute and forward strategies for cooperative distributed antenna systems"

Connected through hyperedge HE-4 (induced by source paper "an upper bound on the sum capacity of the downlink multicell processing with finite backhaul capacity"):
  with members:
    - "capacity bounds for diamond networks with an orthogonal broadcast channel"
    - "capacity bounds for a class of diamond networks"
    - "joint precoding and multivariate backhaul compression for the downlink of cloud radio access networks"
    - "compute and forward strategies for cooperative distributed antenna systems"
    - "an extremal inequality motivated by multiterminal information theoretic problems"

Connected through hyperedge HE-5 (induced by source paper "secure degrees of freedom of the gaussian diamond wiretap channel"):
  with members:
    - "secure degrees of freedom of one hop wireless networks with no eavesdropper csit"
    - "an upper bound on the sum capacity of the downlink multicell processing with finite backhaul capacity"
    - "capacity bounds for diamond networks with an orthogonal broadcast channel"
    - "secure degrees of freedom of one hop wireless networks"
    - "real interference alignment exploiting the potential of single antenna systems"
    - "aligned image sets under channel uncertainty settling a conjecture by lapidoth shamai and wigger on the collapse of degrees of freedom under finite precision csit"
    - "secure degrees of freedom of k user gaussian interference channels a unified view"
    - "achievability proof via output statistics of random binning"

Connected through hyperedge HE-6 (induced by source paper "capacity bounds for diamond networks with an orthogonal broadcast channel"):
  with members:
    - "generalization of mrs gerber s lemma"
    - "capacity bounds for a class of diamond networks"
    - "a new entropy power inequality for integer valued random variables"
    - "achieving the capacity of the n relay gaussian diamond network within log n bits"
    - "wireless network information flow a deterministic approach"
    - "the approximate capacity of the gaussian n relay diamond network"
    - "entropy power inequality for a family of discrete random variables"
    - "dependence balance based outer bounds for gaussian networks with cooperation and feedback"

Connected through hyperedge HE-7 (induced by source paper "the degraded gaussian diamond wiretap channel"):
  with members:
    - "the gaussian multiple access wire tap channel"

Connected through hyperedge HE-8 (induced by source paper "capacity bounds for a class of diamond networks"):
  with members:
    - "wireless network information flow a deterministic approach"

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)