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 "models and information rates for multiuser optical fiber channels with nonlinearity and dispersion"):
  Abstract: Discrete-time interference channel models are developed for information transmission over optical fiber using wavelength-division multiplexing. A set of coupled nonlinear Schroedinger equations forms the basis of the models. The first model is memoryless and captures the nonlinear phenomena of cross-phase modulation but ignores dispersion. For the case of two carriers, a new technique called interference focusing is proposed where each carrier achieves the capacity pre-log 1, thereby doubling the pre-log of 1/2 achieved by using conventional methods. For more than two carriers, interference focusing is also useful under certain conditions. The second model captures the nonlinear phenomena of cross-phase modulation in addition to dispersion due to group velocity mismatch. Moreover, the model captures the effect of filtering at the receivers. In a 3-user system, it is shown that all users can achieve the maximum pre-log factor 1 simultaneously by using interference focusing, a time-limited pulse and a bank of filters at the receivers.

Includes members:
  Member "real interference alignment exploiting the potential of single antenna systems":
    also connected through other hyperedges:
      - Hyperedge HE-1 (induced by source paper "multi antenna coded content delivery with caching a low complexity solution")
  Member "capacity of a nonlinear optical channel with finite memory":
    also connected through other hyperedges:
      - Hyperedge HE-2 (induced by source paper "the log log growth of channel capacity for nondispersive nonlinear optical fiber channel in intermediate power range extension of the model")
  Member "information transmission using the nonlinear fourier transform part ii numerical methods":
    also connected through other hyperedges:
      - Hyperedge HE-3 (induced by source paper "polarization division multiplexing based on the nonlinear fourier transform")
  Member "information transmission using the nonlinear fourier transform part i mathematical tools":
    also connected through other hyperedges:
      - Hyperedge HE-4 (induced by source paper "efficient nonlinear fourier transform algorithms of order four on equispaced grid")
  Member "information transmission using the nonlinear fourier transform part iii spectrum modulation":
    also connected through other hyperedges:
      - Hyperedge HE-5 (induced by source paper "a signal space distance measure for nondispersive optical fiber")
  Member "interference focusing for simplified optical fiber models with dispersion":
    also connected through other hyperedges:
      - Hyperedge HE-6 (induced by source paper "demodulation and detection schemes for a memoryless optical wdm channel")
  Member "on the per sample capacity of nondispersive optical fibers":
    also connected through other hyperedges:
      - Hyperedge HE-7 (induced by source paper "a signal space distance measure for nondispersive optical fiber")
  Member "interference focusing for mitigating cross phase modulation in a simplified optical fiber model":
    also connected through other hyperedges:
      - Hyperedge HE-8 (induced by source paper "models and information rates for wiener phase noise channels")

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)