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: "quantization bounds on grassmann manifolds of arbitrary dimensions and mimo communications with feedback"
  Abstract: This paper considers the quantization problem on the Grassmann manifold with dimension n and p. The unique contribution is the derivation of a closed-form formula for the volume of a metric ball in the Grassmann manifold when the radius is sufficiently small. This volume formula holds for Grassmann manifolds with arbitrary dimension n and p, while previous results are only valid for either p=1 or a fixed p with asymptotically large n. Based on the volume formula, the Gilbert-Varshamov and Hamming bounds for sphere packings are obtained. Assuming a uniformly distributed source and a distortion metric based on the squared chordal distance, tight lower and upper bounds are established for the distortion rate tradeoff. Simulation results match the derived results. As an application of the derived quantization bounds, the information rate of a Multiple-Input Multiple-Output (MIMO) system with finite-rate channel-state feedback is accurately quantified for arbitrary finite number of antennas, while previous results are only valid for either Multiple-Input Single-Output (MISO) systems or those with asymptotically large number of transmit antennas but fixed number of receive antennas.

Connected through hyperedge HE-1 (induced by source paper "feedback topology designs for interference alignment in mimo interference channels"):
  with members:
    - "interference alignment for the k user mimo interference channel"
    - "interference alignment through user cooperation for two cell mimo interfering broadcast channels"
    - "on feasibility of interference alignment in mimo interference networks"
    - "downlink interference alignment"
    - "interference alignment under limited feedback for mimo interference channels"
    - "interference alignment with limited feedback"
    - "on feasibility of interference alignment in mimo interference networks"
    - "adaptive limited feedback for sum rate maximizing beamforming in cooperative multicell systems"

Connected through hyperedge HE-2 (induced by source paper "grassmannian predictive coding for limited feedback in multiple antenna wireless systems"):
  with members:
    - "kerdock codes for limited feedback precoded mimo systems"
    - "mimo broadcast channels with finite rate feedback"
    - "quantization bounds on grassmann manifolds and applications to mimo communications"
    - "limited feedback beamforming over temporally correlated channels"

Connected through hyperedge HE-3 (induced by source paper "capacity of a multiple antenna fading channel with a quantized precoding matrix"):
  with members:
    - "on the information rate of mimo systems with finite rate channel state feedback and power on off strategy"
    - "mimo broadcast channels with finite rate feedback"
    - "performance analysis of cdma signature optimization with finite rate feedback"
    - "quantization bounds on grassmann manifolds and applications to mimo communications"

Connected through hyperedge HE-4 (induced by source paper "joint beamforming for multiaccess mimo systems with finite rate feedback"):
  with members:
    - "a simple converse proof and a unified capacity formula for channels with input constraints"
    - "on the information rate of mimo systems with finite rate channel state feedback and power on off strategy"
    - "mimo broadcast channels with finite rate feedback"
    - "quantization bounds on grassmann manifolds and applications to mimo communications"

Connected through hyperedge HE-5 (induced by source paper "unequal dimensional small balls and quantization on grassmann manifolds"):
  with members:
    - "on the information rate of mimo systems with finite rate channel state feedback using beamforming and power on off strategy"
    - "a feedback reduction technique for mimo broadcast channels"

Connected through hyperedge HE-6 (induced by source paper "multi access mimo systems with finite rate channel state feedback"):
  with members:
    - "on the information rate of mimo systems with finite rate channel state feedback and power on off strategy"

Connected through hyperedge HE-7 (induced by source paper "mimo broadcast channels with block diagonalization and finite rate feedback"):
  with members:
    - "mimo broadcast channels with finite rate feedback"
    - "high snr analysis of mimo broadcast channels"

Connected through hyperedge HE-8 (induced by source paper "quantization bounds on grassmann manifolds and applications to mimo communications"):
  with members:
    - "a feedback reduction technique for mimo broadcast 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)