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: "the degrees of freedom of the 2 hop 2 user interference channel with feedback"
  Abstract: The layered two-hop, two-flow interference network is considered that consists of two sources, two relays and two destinations with the first hop network between he sources and the relays and the second hop network between relays and destinations both being i.i.d. Rayleigh fading Gaussian interference channels. Two feedback models are studied. In the first one, called the delayed channel state information at the sources (delayed CSI-S) model, the sources know all channel coefficients with a finite delay but the relays have no side information whatsoever. In the second feedback model, referred to as the limited Shannon feedback model, the relays know first hop channel coefficients instantaneously and the second hop channel with a finite delay and one relay knows the received signal of one of the destinations with a finite delay and the other relay knows the received signal of the other destination with a finite delay but there is no side information at the sources whatsoever. It is shown in this paper that under both these settings, the layered two-hop, two-flow interference channel has 4/3 degrees of freedom. The result is obtained by developing a broadcast-channel-type upper-bound and new achievability schemes based on the ideas of retrospective interference alignment and retro-cooperative interference alignment, respectively.

Connected through hyperedge HE-1 (induced by source paper "space time interference alignment and degrees of freedom regions for the miso broadcast channel with periodic csi feedback"):
  with members:
    - "degrees of freedom region of the mimo interference channel with output feedback and delayed csit"
    - "optimal use of current and outdated channel state information degrees of freedom of the miso bc with mixed csit"
    - "on the degrees of freedom of time correlated miso broadcast channel with delayed csit"
    - "index coding an interference alignment perspective"
    - "not too delayed csit achieves the optimal degrees of freedom"
    - "interference alignment for the mimo interference channel with delayed local csit"
    - "completely stale transmitter channel state information is still very useful"
    - "on the index coding problem and its relation to network coding and matroid theory"

Connected through hyperedge HE-2 (induced by source paper "the degrees of freedom of mimo networks with full duplex receiver cooperation but no csit"):
  with members:
    - "degrees of freedom region of the mimo interference channel with output feedback and delayed csit"
    - "a new outer bound via interference localization and the degrees of freedom regions of mimo interference networks with no csit"
    - "the degrees of freedom region of the mimo interference channel with shannon feedback"
    - "interference channels with destination cooperation"
    - "degrees of freedom regions of two user mimo z and full interference channels the benefit of reconfigurable antennas"
    - "the degrees of freedom region of the mimo cognitive interference channel with no csit"
    - "the degrees of freedom of mimo interference channels without state information at transmitters"
    - "degrees of freedom of the mimo interference channel with cooperation and cognition"

Connected through hyperedge HE-3 (induced by source paper "capacity of multiple unicast in wireless networks a polymatroidal approach"):
  with members:
    - "real interference alignment exploiting the potential of single antenna systems"
    - "multiuser broadcast erasure channel with feedback capacity and algorithms"
    - "degrees of freedom of interference channels with comp transmission and reception"
    - "multicommodity flows and cuts in polymatroidal networks"
    - "wireless network information flow a deterministic approach"
    - "computation alignment capacity approximation without noise accumulation"
    - "a digital interface for gaussian relay and interference networks lifting codes from the discrete superposition model"
    - "completely stale transmitter channel state information is still very useful"

Connected through hyperedge HE-4 (induced by source paper "the degrees of freedom region of the mimo interference channel with shannon feedback"):
  with members:
    - "a new outer bound via interference localization and the degrees of freedom regions of mimo interference networks with no csit"
    - "ergodic fading interference channels sum capacity and separability"
    - "completely stale transmitter channel state information is still very useful"
    - "retrospective interference alignment"
    - "feedback capacity of the gaussian interference channel to within 2 bits"
    - "the degrees of freedom region of the mimo cognitive interference channel with no csit"
    - "the degrees of freedom of mimo interference channels without state information at transmitters"
    - "on degrees of freedom region of mimo networks without 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)