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: "not too delayed csit achieves the optimal degrees of freedom"
  Abstract: Channel state information at the transmitter (CSIT) aids interference management in many communication systems. Due to channel state information (CSI) feedback delay and time-variation in the wireless channel, perfect CSIT is not realistic. In this paper, the CSI feedback delay-DoF gain trade-off is characterized for the multi-user vector broadcast channel. A major insight is that it is possible to achieve the optimal degrees of freedom (DoF) gain if the delay is less than a certain fraction of the channel coherence time. This precisely characterizes the intuition that a small delay should be negligeable. To show this, a new transmission method called space-time interference alignment is proposed, which actively exploits both the current and past CSI.

Connected through hyperedge HE-1 (induced by source paper "degrees of freedom and achievable rate of wide band multi cell multiple access channels with no csit"):
  with members:
    - "interference free ofdm rethinking ofdm for interference networks with inter symbol interference"
    - "spectral efficiency of dynamic coordinated beamforming a stochastic geometry approach"
    - "topological interference management through index coding"
    - "a practical cooperative multicell mimo ofdma network based on rank coordination"
    - "opportunistic interference alignment for mimo interfering multiple access channels"
    - "optimal use of current and outdated channel state information degrees of freedom of the miso bc with mixed csit"
    - "a new outer bound via interference localization and the degrees of freedom regions of mimo interference networks with no csit"
    - "spatial degrees of freedom of the multicell mimo multiple access channel"

Connected through hyperedge HE-2 (induced by source paper "feedback aided coded caching for the miso bc with small caches"):
  with members:
    - "optimal sum dof of the k user miso bc with current and delayed feedback"
    - "the synergistic gains of coded caching and delayed feedback"
    - "information theoretic caching sequential coding for computing"
    - "joint cache channel coding over erasure broadcast channels"
    - "critical database size for effective caching"
    - "on the benefits of edge caching for mimo interference alignment"
    - "finite length analysis of caching aided coded multicasting"
    - "a transfer learning approach for cache enabled wireless networks"

Connected through hyperedge HE-3 (induced by source paper "the synergistic gains of coded caching and delayed feedback"):
  with members:
    - "achieving full dof in heterogeneous parallel broadcast channels with outdated csit"
    - "information theoretic caching sequential coding for computing"
    - "joint cache channel coding over erasure broadcast channels"
    - "critical database size for effective caching"
    - "caching aided coded multicasting with multiple random requests"
    - "a transfer learning approach for cache enabled wireless networks"
    - "effect of number of users in multi level coded caching"
    - "the performance analysis of coded cache in wireless fading channel"

Connected through hyperedge HE-4 (induced by source paper "optimal sum dof of the k user miso bc with current and delayed feedback"):
  with members:
    - "sum rate maximization for linearly precoded downlink multiuser miso systems with partial csit a rate splitting approach"
    - "achievable dof regions of mimo networks with imperfect csit"
    - "dof analysis of the mimo broadcast channel with alternating hybrid csit"
    - "retrospective interference alignment for the mimo interference broadcast channel"
    - "dof analysis of the k user miso broadcast channel with hybrid csit"
    - "feedback and partial message side information on the semideterministic broadcast channel"
    - "aligned image sets under channel uncertainty settling a conjecture by lapidoth shamai and wigger on the collapse of degrees of freedom under finite precision csit"
    - "the degrees of freedom region of temporally correlated mimo networks with delayed csit"

Connected through hyperedge HE-5 (induced by source paper "optimal dof of the k user broadcast channel with delayed and imperfect current csit"):
  with members:
    - "sum rate maximization for linearly precoded downlink multiuser miso systems with partial csit a rate splitting approach"
    - "achievable dof regions of mimo networks with imperfect csit"
    - "dof analysis of the mimo broadcast channel with alternating hybrid csit"
    - "retrospective interference alignment for the mimo interference broadcast channel"
    - "dof analysis of the k user miso broadcast channel with hybrid csit"
    - "feedback and partial message side information on the semideterministic broadcast channel"
    - "the degrees of freedom region of temporally correlated mimo networks with delayed csit"
    - "on the degrees of freedom of the k user time correlated broadcast channel with delayed csit"

Connected through hyperedge HE-6 (induced by source paper "interference free ofdm rethinking ofdm for interference networks with inter symbol interference"):
  with members:
    - "spectral efficiency of dynamic coordinated beamforming a stochastic geometry approach"
    - "topological interference management through index coding"
    - "fundamental limits of cooperation"
    - "a tractable approach to coverage and rate in cellular networks"
    - "completely stale transmitter channel state information is still very useful"
    - "ergodic interference alignment"

Connected through hyperedge HE-7 (induced by source paper "fundamental limits of cache aided wireless bc interplay of coded caching and csit feedback"):
  with members:
    - "fundamental tradeoff between storage and latency in cache aided wireless interference networks"
    - "degrees of freedom of cache aided wireless interference networks"
    - "optimal sum dof of the k user miso bc with current and delayed feedback"
    - "optimal dof of the k user broadcast channel with delayed and imperfect current csit"
    - "achieving full dof in heterogeneous parallel broadcast channels with outdated csit"
    - "the synergistic gains of coded caching and delayed feedback"
    - "information theoretic caching sequential coding for computing"
    - "joint cache channel coding over erasure broadcast channels"

Connected through hyperedge HE-8 (induced by source paper "distributed space time interference alignment with moderately delayed csit"):
  with members:
    - "space time physical layer network coding"
    - "ergodic interference alignment with delayed feedback"
    - "on the degrees of freedom of k user siso interference and x channels with delayed csit"
    - "degrees of freedom region of the mimo interference channel with output feedback and delayed csit"
    - "degrees of freedom of time correlated miso broadcast channel with delayed csit"
    - "optimal use of current and outdated channel state information degrees of freedom of the miso bc with mixed csit"
    - "on x channels with feedback and delayed csi"
    - "on the degrees of freedom of time correlated miso broadcast channel with delayed csit"

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)