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: "explicit parallel in time integration of a linear acoustic advection system"
  Abstract: The applicability of the Parareal parallel-in-time integration scheme for the solution of a linear, two-dimensional hyperbolic acoustic-advection system, which is often used as a test case for integration schemes for numerical weather prediction (NWP), is addressed. Parallel-in-time schemes are a possible way to increase, on the algorithmic level, the amount of parallelism, a requirement arising from the rapidly growing number of CPUs in high performance computer systems. A recently introduced modification of the “parallel implicit time-integration algorithm” could successfully solve hyperbolic problems arising in structural dynamics. It has later been cast into the framework of Parareal. The present paper adapts this modified Parareal and employs it for the solution of a hyperbolic flow problem, where the initial value problem solved in parallel arises from the spatial discretization of a partial differential equation by a finite difference method. It is demonstrated that the modified Parareal is stable and can produce reasonably accurate solutions while allowing for a noticeable reduction of the time-to-solution. The implementation relies on integration schemes already widely used in NWP (RK-3, partially split forward Euler, forward–backward). It is demonstrated that using an explicit partially split scheme for the coarse integrator allows to avoid the use of an implicit scheme while still achieving speedup.

Connected through hyperedge HE-1 (induced by source paper "shared memory pipelined parareal"):
  with members:
    - "a stencil based implementation of parareal in the c domain specific embedded language stella"
    - "a decentralized parallelization in time approach with parareal"
    - "parallel in space and time simulation of the three dimensional unsteady navier stokes equations for incompressible flow"
    - "enabling highly scalable remote memory access programming with mpi 3 one sided"

Connected through hyperedge HE-2 (induced by source paper "shared memory pipelined parareal"):
  with members:
    - "a stencil based implementation of parareal in the c domain specific embedded language stella"
    - "a decentralized parallelization in time approach with parareal"
    - "parallel in space and time simulation of the three dimensional unsteady navier stokes equations for incompressible flow"
    - "enabling highly scalable remote memory access programming with mpi 3 one sided"

Connected through hyperedge HE-3 (induced by source paper "data driven time parallelism via forecasting"):
  with members:
    - "space time least squares petrov galerkin projection for nonlinear model reduction"
    - "galerkin v least squares petrov galerkin projection in nonlinear model reduction"

Connected through hyperedge HE-4 (induced by source paper "a stencil based implementation of parareal in the c domain specific embedded language stella"):
  with members:
    - "first experiences with validating and using the cray power management database tool"
    - "a space time parallel solver for the three dimensional heat equation"

Connected through hyperedge HE-5 (induced by source paper "parareal convergence for 2d unsteady flow around a cylinder"):
  with members:
    - "a stencil based implementation of parareal in the c domain specific embedded language stella"
    - "numerical simulation of skin transport using parareal"

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.CE(Computational Engineering, Finance, and Science)