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: "optimal distributed beamforming for miso interference channels"
  Abstract: We consider the problem of quantifying the Pareto optimal boundary in the achievable rate region over multiple-input single-output (MISO) interference channels, where the problem boils down to solving a sequence of convex feasibility problems after certain transformations. The feasibility problem is solved by two new distributed optimal beamforming algorithms, where the first one is to parallelize the computation based on the method of alternating projections, and the second one is to localize the computation based on the method of cyclic projections. Convergence proofs are established for both algorithms.

Connected through hyperedge HE-1 (induced by source paper "multiuser wirelessly powered backscatter communications nonlinearity waveform design and sinr energy tradeoff"):
  with members:
    - "fundamentals of wireless information and power transfer from rf energy harvester models to signal and system designs"
    - "wirelessly powered backscatter communications waveform design and snr energy tradeoff"
    - "large scale multiantenna multisine wireless power transfer"
    - "prototyping and experimentation of a closed loop wireless power transmission with channel acquisition and waveform optimization"
    - "low complexity adaptive multisine waveform design for wireless power transfer"
    - "backscatter communications for the internet of things a stochastic geometry approach"
    - "waveform design for wireless power transfer"
    - "wireless information and power transfer nonlinearity waveform design and rate energy tradeoff"

Connected through hyperedge HE-2 (induced by source paper "parallel and distributed methods for nonconvex optimization part ii applications"):
  with members:
    - "parallel selective algorithms for big data optimization"
    - "parallel and distributed methods for nonconvex optimization part i theory"
    - "decomposition by partial linearization parallel optimization of multi agent systems"
    - "weighted fair multicast multigroup beamforming under per antenna power constraints"
    - "alternating rate profile optimization in single stream mimo interference channels"
    - "coordinated multicast beamforming in multicell networks"
    - "distributed optimal beamformers for cognitive radios robust to channel uncertainties"
    - "sum rate maximization in two way af mimo relaying polynomial time solutions to a class of dc programming problems"

Connected through hyperedge HE-3 (induced by source paper "beamforming for miso interference channels with qos and rf energy transfer"):
  with members:
    - "multiuser miso beamforming for simultaneous wireless information and power transfer"
    - "joint transmit beamforming and receive power splitting for miso swipt systems"
    - "joint beamforming and power control in coordinated multicell max min duality effective network and large system transition"
    - "relaying protocols for wireless energy harvesting and information processing"
    - "relay selection for simultaneous information transmission and wireless energy transfer a tradeoff perspective"
    - "wireless information and power transfer a dynamic power splitting approach"
    - "two way communication with energy exchange"
    - "throughput maximization for an energy harvesting communication system with processing cost"

Connected through hyperedge HE-4 (induced by source paper "coalitional games in miso interference channels epsilon core and coalition structure stable set"):
  with members:
    - "coalitional games in partition form for joint spectrum sensing and access in cognitive radio networks"
    - "exchange economy in two user multiple input single output interference channels"
    - "robust monotonic optimization framework for multicell miso systems"
    - "coalitional game theory for communication networks a tutorial"
    - "the cost of stability in coalitional games"
    - "stable partitions in coalitional games"

Connected through hyperedge HE-5 (induced by source paper "parallel and distributed methods for nonconvex optimization part i theory"):
  with members:
    - "signal processing and optimal resource allocation for the interference channel"
    - "decomposition by partial linearization parallel optimization of multi agent systems"
    - "distributed optimal beamformers for cognitive radios robust to channel uncertainties"
    - "decomposition by successive convex approximation a unifying approach for linear transceiver design in heterogeneous networks"
    - "linear transceiver design for a mimo interfering broadcast channel achieving max min fairness"

Connected through hyperedge HE-6 (induced by source paper "cb refim a practical coordinated beamforming in multicell networks"):
  with members:
    - "coordinated beamforming with relaxed zero forcing the sequential orthogonal projection combining method and rate control"
    - "refim a practical interference management in heterogeneous wireless access networks"
    - "optimality properties distributed strategies and measurement based evaluation of coordinated multicell ofdma transmission"
    - "optimal beamforming in interference networks with perfect local channel information"

Connected through hyperedge HE-7 (induced by source paper "alternating rate profile optimization in single stream mimo interference channels"):
  with members:
    - "on the pareto optimal beam structure and design for multi user mimo interference channels"
    - "pareto boundary of the rate region for single stream mimo interference channels linear transceiver design"
    - "pareto characterization of the multicell mimo performance region with simple receivers"
    - "achieving global optimality for weighted sum rate maximization in the k user gaussian interference channel with multiple antennas"
    - "linear transceiver design for a mimo interfering broadcast channel achieving max min fairness"
    - "cooperative algorithms for mimo interference channels"
    - "balancing egoism and altruism on the interference channel the mimo case"
    - "cooperative interference management with miso beamforming"

Connected through hyperedge HE-8 (induced by source paper "multi cell random beamforming achievable rate and degrees of freedom region"):
  with members:
    - "network mimo with linear zero forcing beamforming large system analysis impact of channel estimation and reduced complexity scheduling"
    - "multi cell mimo downlink with cell cooperation and fair scheduling a large system limit analysis"
    - "base station cooperation on the downlink large system analysis"
    - "cooperative interference management with miso beamforming"
    - "cooperative multi cell block diagonalization with per base station power constraints"
    - "on gaussian mimo bc mac duality with multiple transmit covariance constraints"
    - "degrees of freedom of the k user m times n mimo interference channel"
    - "gaussian interference channel capacity to within one bit"

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)