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 region of the mimo cognitive interference channel with no csit"
  Abstract: The cognitive interference channel (C-IC) is defined as the interference channel (i.e., it consists of two transmitter-receiver pairs) in which any subset of the four terminals is cognitive. The degrees of freedom (dof) region of the C-IC is studied for the case in which there is perfect and no channel state information at the receivers and the transmitters, respectively. The inner and outer-bounds to the dof region are proposed. These bounds yield the perfect characterization of dof region, except for a few cases of cognition for which, over a small subset of all possible values of the number of antennas at four terminals, the bounds are not tight. Lastly, an example on the feasibility of the interference alignment, without the knowledge of the actual channel realizations at the transmitters, is presented.

Connected through hyperedge HE-1 (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"
    - "the degrees of freedom of the 2 hop 2 user interference channel with 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 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-2 (induced by source paper "the degrees of freedom region and interference alignment for the mimo interference channel with delayed csi"):
  with members:
    - "completely stale transmitter channel state information is still very useful"
    - "retrospective interference alignment"
    - "exploiting channel correlations simple interference alignment schemes with no csit"
    - "the degrees of freedom of mimo interference channels without state information at transmitters"
    - "interference alignment under limited feedback for mimo interference channels"
    - "isotropic mimo interference channels without csit the loss of degrees of freedom"
    - "on degrees of freedom region of mimo networks without csit"
    - "a new outer bound and the noisy interference sum rate capacity for gaussian interference channels"

Connected through hyperedge HE-3 (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"
    - "the degrees of freedom of the 2 hop 2 user interference channel with feedback"
    - "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 of mimo interference channels without state information at transmitters"
    - "on degrees of freedom region of mimo networks without csit"

Connected through hyperedge HE-4 (induced by source paper "the degrees of freedom regions of mimo broadcast interference and cognitive radio channels with no csit"):
  with members:
    - "real interference alignment exploiting the potential of single antenna systems"
    - "completely stale transmitter channel state information is still very useful"
    - "exploiting channel correlations simple interference alignment schemes with no csit"
    - "the degrees of freedom of mimo interference channels without state information at transmitters"
    - "dirty paper coding for the mimo cognitive radio channel with imperfect csit"
    - "capacity bounds for two hop interference networks"
    - "interference alignment under limited feedback for mimo interference channels"
    - "isotropic mimo interference channels without csit the loss of degrees of freedom"

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)