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: "numerical stability of explicit runge kutta finite difference schemes for the nonlinear schr odinger equation"
  Abstract: Linearized numerical stability bounds for solving the nonlinear time-dependent Schr\"odinger equation (NLSE) using explicit finite-differencing are shown. The bounds are computed for the fourth-order Runge-Kutta scheme in time and both second-order and fourth-order central differencing in space. Results are given for Dirichlet, modulus-squared Dirichlet, Laplacian-zero, and periodic boundary conditions for one, two, and three dimensions. Our approach is to use standard Runge-Kutta linear stability theory, treating the nonlinearity of the NLSE as a constant. The required bounds on the eigenvalues of the scheme matrices are found analytically when possible, and otherwise estimated using the Gershgorin circle theorem.

Connected through hyperedge HE-1 (induced by source paper "nlsemagic nonlinear schrodinger equation multi dimensional matlab based gpu accelerated integrators using compact high order schemes"):
  with members:
    - "a modulus squared dirichlet boundary condition for time dependent complex partial differential equations and its application to the nonlinear schr odinger equation"
    - "a two step high order compact scheme for the laplacian operator and its implementation in an explicit method for integrating the nonlinear schr odinger equation"
    - "a performance comparison of cuda and opencl"

Connected through hyperedge HE-2 (induced by source paper "a two step high order compact scheme for the laplacian operator and its implementation in an explicit method for integrating the nonlinear schr odinger equation"):
  with members:
    - "nlsemagic nonlinear schrodinger equation multi dimensional matlab based gpu accelerated integrators using compact high order schemes"
    - "a modulus squared dirichlet boundary condition for time dependent complex partial differential equations and its application to the nonlinear schr odinger equation"

Connected through hyperedge HE-3 (induced by source paper "a modulus squared dirichlet boundary condition for time dependent complex partial differential equations and its application to the nonlinear schr odinger equation"):
  with members:
    - "nlsemagic nonlinear schrodinger equation multi dimensional matlab based gpu accelerated integrators using compact high order schemes"

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.NA(Numerical Analysis)