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: "probabilistic sinr constrained robust transmit beamforming a bernstein type inequality based conservative approach"
  Abstract: Recently, robust transmit beamforming has drawn considerable attention because it can provide guaranteed receiver performance in the presence of channel state information (CSI) errors. Assuming complex Gaussian distributed CSI errors, this paper investigates the robust beamforming design problem that minimizes the transmission power subject to probabilistic signal-to-interference-plus-noise ratio (SINR) constraints. The probabilistic SINR constraints in general have no closed-form expression and are difficult to handle. Based on a Bernstein-type inequality of complex Gaussian random variables, we propose a conservative formulation to the robust beamforming design problem. The semidefinite relaxation technique can be applied to efficiently handle the proposed conservative formulation. Simulation results show that, in comparison with the existing methods, the proposed method is more power efficient and is able to support higher target SINR values for receivers.

Connected through hyperedge HE-1 (induced by source paper "robust resource allocation for pd noma based miso heterogeneous networks with comp technology"):
  with members:
    - "radio resource allocation for device to device underlay communication using hypergraph theory"
    - "user association in 5g networks a survey and an outlook"
    - "optimal joint power and subcarrier allocation for full duplex multicarrier non orthogonal multiple access systems"
    - "optimal dynamic point selection for power minimization in multiuser downlink comp"
    - "optimal stochastic coordinated beamforming for wireless cooperative networks with csi uncertainty"
    - "low complexity delay constrained beamforming for multi user mimo systems with imperfect csit"
    - "robust monotonic optimization framework for multicell miso systems"
    - "worst case sinr constrained robust coordinated beamforming for multicell wireless systems"

Connected through hyperedge HE-2 (induced by source paper "stochastic successive convex approximation for non convex constrained stochastic optimization"):
  with members:
    - "a parallel decomposition method for nonconvex stochastic multi agent optimization problems"
    - "incremental gradient subgradient and proximal methods for convex optimization a survey"
    - "decomposition by partial linearization parallel optimization of multi agent systems"
    - "saga a fast incremental gradient method with support for non strongly convex composite objectives"
    - "online stochastic optimization with multiple objectives"

Connected through hyperedge HE-3 (induced by source paper "sample approximation based deflation approaches for chance sinr constrained joint power and admission control"):
  with members:
    - "coordinated beamforming for multiuser miso interference channel under rate outage constraints"
    - "joint power and admission control via linear programming deflation"
    - "a decentralized method for joint admission control and beamforming in coordinated multicell downlink"
    - "joint bandwidth and power allocation with admission control in wireless multi user networks with and without relaying"

Connected through hyperedge HE-4 (induced by source paper "two stage subspace constrained precoding in massive mimo cellular systems"):
  with members:
    - "scaling up mimo opportunities and challenges with very large arrays"
    - "a coordinated approach to channel estimation in large scale multiple antenna systems"
    - "large system analysis of linear precoding in correlated miso broadcast channels under limited feedback"

Connected through hyperedge HE-5 (induced by source paper "optimal stochastic coordinated beamforming for wireless cooperative networks with csi uncertainty"):
  with members:
    - "topological interference management through index coding"
    - "group sparse beamforming for green cloud ran"
    - "low complexity delay constrained beamforming for multi user mimo systems with imperfect csit"
    - "network mimo with linear zero forcing beamforming large system analysis impact of channel estimation and reduced complexity scheduling"
    - "fundamental limits of cooperation"
    - "robust monotonic optimization framework for multicell miso systems"
    - "mimo interference alignment over correlated channels with imperfect csi"
    - "completely stale transmitter channel state information is still very useful"

Connected through hyperedge HE-6 (induced by source paper "large system analysis of cooperative multi cell downlink transmission via regularized channel inversion with imperfect csit"):
  with members:
    - "joint beamforming and power control in coordinated multicell max min duality effective network and large system transition"
    - "on capacity of large scale mimo multiple access channels with distributed sets of correlated antennas"
    - "large system analysis of linear precoding in correlated miso broadcast channels under limited feedback"
    - "robust monotonic optimization framework for multicell miso systems"
    - "robust linear precoder design for multi cell downlink transmission"
    - "adaptive limited feedback for sum rate maximizing beamforming in cooperative multicell systems"
    - "mimo broadcast channels with finite rate feedback"

Connected through hyperedge HE-7 (induced by source paper "outage constrained robust secure transmission for miso wiretap channels"):
  with members:
    - "spatially selective artificial noise aided transmit optimization for miso multi eves secrecy rate maximization"
    - "robust secure transmission in miso channels based on worst case optimization"
    - "optimal and robust transmit designs for miso channel secrecy by semidefinite programming"
    - "solutions for the mimo gaussian wiretap channel with a cooperative jammer"
    - "outage constrained robust transmit optimization for multiuser miso downlinks tractable approximations by conic optimization"
    - "secure transmission with multiple antennas ii the mimome wiretap channel"

Connected through hyperedge HE-8 (induced by source paper "low complexity delay constrained beamforming for multi user mimo systems with imperfect csit"):
  with members:
    - "solving pomdps by searching the space of finite policies"
    - "delay aware bs discontinuous transmission control and user scheduling for energy harvesting downlink coordinated mimo systems"
    - "a survey on delay aware resource control for wireless systems large deviation theory stochastic lyapunov drift and distributed stochastic learning"
    - "queue aware dynamic clustering and power allocation for network mimo systems via distributed stochastic learning"
    - "slow adaptive ofdma systems through chance constrained programming"
    - "a convex approximation approach to weighted sum rate maximization of multiuser miso interference channel under outage constraints"

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)