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: "eigenvalue distributions of sums and products of large random matrices via incremental matrix expansions"
  Abstract: This paper uses an incremental matrix expansion approach to derive asymptotic eigenvalue distributions (a.e.d.'s) of sums and products of large random matrices. We show that the result can be derived directly as a consequence of two common assumptions, and matches the results obtained from using R- and S-transforms in free probability theory. We also give a direct derivation of the a.e.d. of the sum of certain random matrices which are not free. This is used to determine the asymptotic signal-to-interference-ratio of a multiuser CDMA system with a minimum mean-square error linear receiver.

Connected through hyperedge HE-1 (induced by source paper "coordinated multi cell beamforming for massive mimo a random matrix approach"):
  with members:
    - "massive mimo for next generation wireless systems"
    - "hierarchical interference mitigation for massive mimo cellular networks"
    - "linear precoding based on polynomial expansion reducing complexity in massive mimo"
    - "designing multi user mimo for energy efficiency when is massive mimo the answer"
    - "network mimo with linear zero forcing beamforming large system analysis impact of channel estimation and reduced complexity scheduling"
    - "energy and spectral efficiency of very large multiuser mimo systems"
    - "base station cooperation on the downlink large system analysis"
    - "pilot contamination and precoding in multi cell tdd systems"

Connected through hyperedge HE-2 (induced by source paper "asymptotic mmse analysis under sparse representation modeling"):
  with members:
    - "analysis of regularized ls reconstruction and random matrix ensembles in compressed sensing"
    - "signal recovery using expectation consistent approximation for linear observations"
    - "analysis of mismatched estimation errors using gradients of partition functions"
    - "performance regions in compressed sensing from noisy measurements"
    - "support recovery with sparsely sampled free random matrices"
    - "large system analysis of linear precoding in correlated miso broadcast channels under limited feedback"
    - "a deterministic equivalent for the analysis of non gaussian correlated mimo multiple access channels"
    - "information theoretically optimal compressed sensing via spatial coupling and approximate message passing"

Connected through hyperedge HE-3 (induced by source paper "large system analysis of linear precoding in miso broadcast channels with confidential messages"):
  with members:
    - "principles of physical layer security in multiuser wireless networks a survey"
    - "secrecy sum rates with regularized channel inversion precoding under imperfect csi at the transmitter"
    - "linear precoding for broadcast channels with confidential messages under transmit side channel correlation"
    - "secrecy sum rates for multi user mimo regularized channel inversion precoding"
    - "large system analysis of linear precoding in correlated miso broadcast channels under limited feedback"
    - "rethinking the secrecy outage formulation a secure transmission design perspective"
    - "robust beamforming for security in mimo wiretap channels with imperfect csi"
    - "secure transmission with artificial noise over fading channels achievable rate and optimal power allocation"

Connected through hyperedge HE-4 (induced by source paper "random beamforming over quasi static and fading channels a deterministic equivalent approach"):
  with members:
    - "large system analysis of linear precoding in correlated miso broadcast channels under limited feedback"
    - "free deterministic equivalents rectangular random matrix models and operator valued free probability theory"
    - "asymptotic moments for interference mitigation in correlated fading channels"
    - "a deterministic equivalent for the analysis of correlated mimo multiple access channels"
    - "performance of orthogonal beamforming for sdma with limited feedback"

Connected through hyperedge HE-5 (induced by source paper "random beamforming over correlated fading channels"):
  with members:
    - "large system analysis of linear precoding in correlated miso broadcast channels under limited feedback"
    - "asymptotic moments for interference mitigation in correlated fading channels"
    - "transmission capacity of ad hoc networks with multiple antennas using transmit stream adaptation and interference cancelation"
    - "performance of orthogonal beamforming for sdma with limited feedback"

Connected through hyperedge HE-6 (induced by source paper "a deterministic equivalent for the analysis of correlated mimo multiple access channels"):
  with members:
    - "on the capacity achieving covariance matrix for frequency selective mimo channels using the asymptotic approach"
    - "on the outage capacity of correlated multiple path mimo channels"

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)