human: Given a hyperedge-centered hypergraph: <hypergraph>, where the center hyperedge is induced by one source paper and its member nodes are the cited papers.

Details of the hypergraph:
Center hyperedge (induced by source paper "retrospective interference alignment for the mimo interference broadcast channel"):
  Abstract: Retrospective Interference Alignment is a linear precoding strategy that seizes delayed channel state information at the transmitters (CSIT), improving the degrees of freedom (DoF) that can be achieved without CSIT for both the broadcast and interference channels. However, little is known for other channel configurations. This work studies the multiple-input multiple-output interference broadcast channel (IBC) with delayed CSIT, 2 cells and 2 users per cell. Although some of the schemes designed for other channels may be applied, they do not exploit the specific topology of the IBC. In this regard, we proposes a precoding strategy that includes the concept of redundancy transmission, and takes into account that users of each cell are served by a common transmitter. Assuming that transmitters and receivers are equipped with M, N antennas, respectively, state-of-the-art achievable DoF are improved for ρ = M over N > ρ A , with ρ A  ≈ 3.5414.

Includes members:
  Member "achievable dof delay trade offs for the k user mimo interference channel with delayed csit":
    also connected through other hyperedges:
      - Hyperedge HE-1 (induced by source paper "on the degrees of freedom of the miso interference broadcast channel with delayed csit")
  Member "degrees of freedom of the k user miso interference channel with delayed local csit":
    also connected through other hyperedges:
      - Hyperedge HE-2 (induced by source paper "achievable dof delay trade offs for the k user mimo interference channel with delayed csit")
  Member "on the degrees of freedom of the k user miso interference channel with imperfect delayed csit":
    also connected through other hyperedges:
      - Hyperedge HE-3 (induced by source paper "achievable dof delay trade offs for the k user mimo interference channel with delayed csit")
  Member "on the degrees of freedom of k user siso interference and x channels with delayed csit":
    also connected through other hyperedges:
      - Hyperedge HE-4 (induced by source paper "capacity results for intermittent x channels with delayed channel state feedback")
  Member "linear degrees of freedom of the mimo x channel with delayed csit":
    also connected through other hyperedges:
      - Hyperedge HE-5 (induced by source paper "linear degrees of freedom of mimo broadcast channels with reconfigurable antennas in the absence of csit")
  Member "completely stale transmitter channel state information is still very useful":
    also connected through other hyperedges:
      - Hyperedge HE-6 (induced by source paper "achievable dof regions of three user mimo broadcast channel with delayed csit")

Question: Please tell me which class the source paper 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)