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: "occa a unified approach to multi threading languages"
  Abstract: The inability to predict lasting languages and architectures led us to develop OCCA, a C++ library focused on host-device interaction. Using run-time compilation and macro expansions, the result is a novel single kernel language that expands to multiple threading languages. Currently, OCCA supports device kernel expansions for the OpenMP, OpenCL, and CUDA platforms. Computational results using finite difference, spectral element and discontinuous Galerkin methods show OCCA delivers portable high performance in different architectures and platforms.

Connected through hyperedge HE-1 (induced by source paper "pressio enabling projection based model reduction for large scale nonlinear dynamical systems"):
  with members:
    - "stability conditions for the explicit integration of projection based nonlinear reduced order and hyper reduced structural mechanics finite element models"
    - "model reduction of dynamical systems on nonlinear manifolds using deep convolutional autoencoders"
    - "conservative model reduction for finite volume models"
    - "space time least squares petrov galerkin projection for nonlinear model reduction"
    - "pymor generic algorithms and interfaces for model order reduction"
    - "preserving lagrangian structure in nonlinear model reduction with application to structural dynamics"

Connected through hyperedge HE-2 (induced by source paper "array program transformation with loo py by example high order finite elements"):
  with members:
    - "gpu accelerated spectral finite elements on all hex meshes"
    - "cross loop optimization of arithmetic intensity for finite element local assembly"
    - "loo py from fortran to performance via transformation and substitution rules"
    - "loo py transformation based code generation for gpus and cpus"

Connected through hyperedge HE-3 (induced by source paper "a lightweight approach to performance portability with targetdp"):
  with members:
    - "targetdp an abstraction of lattice based parallelism with portable performance"

Connected through hyperedge HE-4 (induced by source paper "gpu accelerated spectral finite elements on all hex meshes"):
  with members:
    - "finite element integration on gpus"

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.DC(Distributed, Parallel, and Cluster Computing)