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: "alternating rate profile optimization in single stream mimo interference channels"
  Abstract: The multiple-input multiple-output interference channel is considered with perfect channel information at the transmitters and single-user decoding receivers. With all transmissions restricted to single stream beamforming, we consider the problem of finding all Pareto optimal rate-tuples in the achievable rate region. The problem is cast as a rate profile optimization problem. Due to its nonconvexity, we resort to an alternating approach: For fixed receivers, optimal transmission is known. For fixed transmitters, we show that optimal receive beamforming is a solution to an inverse field of values problem. We prove the solution's stationarity and compare it with existing approaches.

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"
    - "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"
    - "achieving global optimality for weighted sum rate maximization in the k user gaussian interference channel with multiple antennas"

Connected through hyperedge HE-3 (induced by source paper "genie tree and degrees of freedom of the symmetric mimo interfering broadcast channel"):
  with members:
    - "genie chains exploring outer bounds on the degrees of freedom of mimo interference networks"
    - "feasibility of interference alignment for the mimo interference channel"
    - "the feasibility conditions for interference alignment in mimo networks"
    - "on the feasibility of linear interference alignment for mimo interference broadcast channels with constant coefficients"
    - "degrees of freedom of mimo cellular networks decomposition and linear beamforming design"
    - "on the degrees of freedom achievable through interference alignment in a mimo interference channel"
    - "a feasibility test for linear interference alignment in mimo channels with constant coefficients"
    - "subspace alignment chains and the degrees of freedom of the three user mimo interference channel"

Connected through hyperedge HE-4 (induced by source paper "genie chain and degrees of freedom of symmetric mimo interference broadcast channels"):
  with members:
    - "on the feasibility of linear interference alignment for mimo interference broadcast channels with constant coefficients"
    - "on the degrees of freedom achievable through interference alignment in a mimo interference channel"
    - "settling the feasibility of interference alignment for the mimo interference channel the symmetric square case"
    - "spatial degrees of freedom of the multicell mimo multiple access channel"
    - "geometry of the 3 user mimo interference channel"
    - "on feasibility of interference alignment in mimo interference networks"
    - "downlink interference alignment"
    - "on feasibility of interference alignment in mimo interference networks"

Connected through hyperedge HE-5 (induced by source paper "on the pareto optimal beam structure and design for multi user mimo interference channels"):
  with members:
    - "coordinated beamforming with relaxed zero forcing the sequential orthogonal projection combining method and rate control"
    - "scaling up mimo opportunities and challenges with very large arrays"
    - "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"
    - "optimal beamforming in interference networks with perfect local channel information"
    - "cooperative interference management with miso beamforming"

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)