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: "information transmission using the nonlinear fourier transform part ii numerical methods"
  Abstract: In this paper, numerical methods are suggested to compute the discrete and the continuous spectrum of a signal with respect to the Zakharov-Shabat system, a Lax operator underlying numerous integrable communication channels including the nonlinear Schrodinger channel, modeling pulse propagation in optical fibers. These methods are subsequently tested and their ability to estimate the spectrum are compared against each other. These methods are used to compute the spectrum of various signals commonly used in the optical fiber communications. It is found that the layer peeling and the spectral methods are suitable schemes to estimate the nonlinear spectra with good accuracy. To illustrate the structure of the spectrum, the locus of the eigenvalues is determined under amplitude and phase modulation in a number of examples. It is observed that in some cases, as signal parameters vary, eigenvalues collide and change their course of motion. The real axis is typically the place from which new eigenvalues originate or, are absorbed into after traveling a trajectory in the complex plane.

Connected through hyperedge HE-1 (induced by source paper "polarization division multiplexing based on the nonlinear fourier transform"):
  with members:
    - "signaling on the continuous spectrum of nonlinear optical fiber"
    - "why noise and dispersion may seriously hamper nonlinear frequency division multiplexing"
    - "demonstration of fully nonlinear spectrum modulated system in the highly nonlinear optical transmission regime"
    - "fast numerical nonlinear fourier transforms"
    - "information transmission using the nonlinear fourier transform part i mathematical tools"
    - "information transmission using the nonlinear fourier transform part iii spectrum modulation"

Connected through hyperedge HE-2 (induced by source paper "the kolmogorov zakharov model for optical fiber communication"):
  with members:
    - "nonlinear frequency division multiplexing"
    - "linear and nonlinear frequency division multiplexing"
    - "information transmission using the nonlinear fourier transform part i mathematical tools"

Connected through hyperedge HE-3 (induced by source paper "correlated eigenvalues optical communications"):
  with members:
    - "experimental demonstration of nonlinear frequency division multiplexed transmission"
    - "information transmission using the nonlinear fourier transform part i mathematical tools"
    - "information transmission using the nonlinear fourier transform part iii spectrum modulation"

Connected through hyperedge HE-4 (induced by source paper "signaling on the continuous spectrum of nonlinear optical fiber"):
  with members:
    - "fast numerical nonlinear fourier transforms"
    - "information transmission using the nonlinear fourier transform part i mathematical tools"
    - "information transmission using the nonlinear fourier transform part iii spectrum modulation"

Connected through hyperedge HE-5 (induced by source paper "linear and nonlinear frequency division multiplexing"):
  with members:
    - "a novel detection strategy for nonlinear frequency division multiplexing"
    - "decision feedback detection strategy for nonlinear frequency division multiplexing"
    - "communication using eigenvalues of higher multiplicity of the nonlinear fourier transform"
    - "the kolmogorov zakharov model for optical fiber communication"
    - "correlated eigenvalues optical communications"
    - "why noise and dispersion may seriously hamper nonlinear frequency division multiplexing"
    - "polarization division multiplexing based on the nonlinear fourier transform"
    - "nonlinear frequency division multiplexing in the focusing regime"

Connected through hyperedge HE-6 (induced by source paper "capacity lower bounds of the noncentral chi channel with applications to soliton amplitude modulation"):
  with members:
    - "performance prediction of nonbinary forward error correction in optical transmission experiments"
    - "nonlinear frequency division multiplexing"
    - "nonlinear frequency division multiplexing in the focusing regime"
    - "a lower bound on the per soliton capacity of the nonlinear optical fibre channel"
    - "upper bound on the capacity of a cascade of nonlinear and noisy channels"
    - "fast numerical nonlinear fourier transforms"
    - "upper bound on the capacity of the nonlinear schr odinger channel"
    - "information transmission using the nonlinear fourier transform part i mathematical tools"

Connected through hyperedge HE-7 (induced by source paper "the asymptotic capacity of the optical fiber"):
  with members:
    - "nonlinear frequency division multiplexing"
    - "models and information rates for multiuser optical fiber channels with nonlinearity and dispersion"
    - "conditions for a monotonic channel capacity"
    - "upper bound on the capacity of a cascade of nonlinear and noisy channels"
    - "upper bound on the capacity of the nonlinear schr odinger channel"
    - "information transmission using the nonlinear fourier transform part i mathematical tools"
    - "information transmission using the nonlinear fourier transform part iii spectrum modulation"
    - "transmission of information via the non linear scroedinger equation the random gaussian input case"

Connected through hyperedge HE-8 (induced by source paper "nonlinear frequency division multiplexing"):
  with members:
    - "the kolmogorov zakharov model for optical fiber communication"
    - "digital backpropagation in the nonlinear fourier domain"
    - "experimental demonstration of nonlinear frequency division multiplexed transmission"
    - "information transmission using the nonlinear fourier transform part i mathematical tools"
    - "information transmission using the nonlinear fourier transform part iii spectrum modulation"
    - "on the achievable communication rates of generalized soliton transmission systems"

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)