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: "genie chain and degrees of freedom of symmetric mimo interference broadcast channels"
  Abstract: In this paper, we study the information theoretic degrees of freedom (DoF) for symmetric multi-input-multi-output interference broadcast channel (MIMO-IBC) with arbitrary configuration. We find the maximal DoF achieved by linear interference alignment (IA), and prove when linear IA can achieve the information theoretic maximal DoF. Specifically, we find that the information theoretic DoF can be divided into two regions according to the ratio of the number of antennas at each base station (BS) to that at each user. In Region I, the sum DoF of the system linearly increases with the number of cells, which can be achieved by asymptotic IA but not by linear IA, where infinite time/frequency extension is necessary. In Region II, the DoF is a piecewise linear function, depending on the number of antennas at each BS or that at each user alternately, which can be achieved by linear IA without the need of infinite time/frequency extension, and the sum DoF cannot exceed the sum number of antennas at each BS and each user. We propose and prove the information theoretic DoF upper-bound for general MIMO-IBC including the system settings in Regions I and II, by constructing a useful and smart genie chain. We prove the achievability of the upper-bound in Region II by proposing a unified way to design closed-form linear IA. From the proof we reveal when proper systems are feasible or infeasible and explain why. The approach of the proof can be extended to more general asymmetric MIMO-IBC.

Connected through hyperedge HE-1 (induced by source paper "role of interference alignment in wireless cellular network optimization"):
  with members:
    - "joint beamforming and power control in coordinated multicell max min duality effective network and large system transition"
    - "multilevel topological interference management"
    - "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"
    - "degrees of freedom of mimo x networks spatial scale invariance one sided decomposability and linear feasibility"
    - "degrees of freedom of interference channels with comp transmission and reception"

Connected through hyperedge HE-2 (induced by source paper "degrees of freedom of uplink downlink multiantenna cellular networks"):
  with members:
    - "degrees of freedom of full duplex multiantenna cellular networks"
    - "real interference alignment exploiting the potential of single antenna systems"
    - "cellular interference alignment"
    - "genie tree and degrees of freedom of the symmetric mimo interfering broadcast channel"
    - "hetnets and massive mimo modeling potential gains and performance analysis"
    - "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"
    - "regularized zero forcing interference alignment for the two cell mimo interfering broadcast channel"

Connected through hyperedge HE-3 (induced by source paper "interference alignment for multicell multiuser mimo uplink channels"):
  with members:
    - "degrees of freedom of full duplex multiantenna cellular networks"
    - "cellular interference alignment omni directional antennas and asymmetric configurations"
    - "real interference alignment exploiting the potential of single antenna systems"
    - "degrees of freedom of uplink downlink multiantenna cellular networks"
    - "cellular interference alignment"
    - "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"
    - "interference alignment for partially connected mimo cellular networks"

Connected through hyperedge HE-4 (induced by source paper "on non integer linear degrees of freedom of constant two cell mimo cellular networks"):
  with members:
    - "genie tree and degrees of freedom of the symmetric mimo interfering broadcast channel"
    - "on the feasibility of linear interference alignment for mimo interference broadcast channels with constant coefficients"
    - "maximum rate transmission with improved diversity gain for interference networks"
    - "subspace alignment chains and the degrees of freedom of the three user mimo interference channel"
    - "spatial degrees of freedom of the multicell mimo multiple access channel"
    - "downlink interference alignment"
    - "interference alignment with asymmetric complex signaling settling the host madsen nosratinia conjecture"

Connected through hyperedge HE-5 (induced by source paper "degrees of freedom of mimo cellular networks decomposition and linear beamforming design"):
  with members:
    - "real interference alignment exploiting the potential of single antenna systems"
    - "progress on polynomial identity testing ii"
    - "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"
    - "a feasibility test for linear interference alignment in mimo channels with constant coefficients"
    - "degrees of freedom of mimo x networks spatial scale invariance one sided decomposability and linear feasibility"
    - "subspace alignment chains and the degrees of freedom of the three user mimo interference channel"
    - "on the spatial degrees of freedom of multicell and multiuser 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)