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: "simflowny 2 an upgraded platform for scientific modelling and simulation"
  Abstract: Abstract   Simflowny is an open platform for scientific dynamical models which automatically generates parallel code for different simulation frameworks. Here we present major upgrades on this software to support an extended set of model families, in particular: (i) a new family for the evolution of partial differential equations, which can include spatial derivatives of any order, (ii) a new family for agent based models to study complex phenomena — either on a spatial domain or on a graph. Additionally we introduce an upgraded flexible graphical user interface to accommodate these and future families of equations and models. This paper describes the new architecture and summarizes the formal representation and implementation of these new families, providing several validation results.    Program summary  Program Title: Simflowny  Program Files doi:  http://dx.doi.org/10.17632/g9mcw8s64f.1 #N#              Licensing provisions: Apache License, 2.0  Programming language: Java, C++ and JavaScript  Journal Reference of previous version: Comput. Phys. Comm. 184 (2013) 2321–2331  Does the new version supersede the previous version?: Yes  Reasons for the new version: Additional features  Summary of revisions: Expanded support for Partial Differential Equations, Support for Agent Based Models, New Graphical User Interface.  Nature of problem: Simflowny generates numerical simulation code for a wide range of models.  Solution method: Any discretization scheme based on either Finite Volume Methods, Finite Difference Methods, or meshless methods for Partial Differential Equations. Agent Based Model simulations execute their own algorithm as set in their models.  Additional comments: The software architecture is easily extensible for future additional model families and simulation frameworks. Full documentation is available in the wiki home of the Simflowny project [2].  References:  [1]  https://www.docker.com/  [online] (2017)  [1]  https://bitbucket.org/iac3/simflowny/wiki/Home  [online] (2017)

Connected through hyperedge HE-1 (induced by source paper "devito v3 1 0 an embedded domain specific language for finite differences and geophysical exploration"):
  with members:
    - "architecture and performance of devito a system for automated stencil computation"
    - "high level python abstractions for optimal checkpointing in inversion problems"
    - "optimised finite difference computation from symbolic equations"
    - "performance prediction of finite difference solvers for different computer architectures"
    - "firedrake automating the finite element method by composing abstractions"
    - "opensbli a framework for the automated derivation and parallel execution of finite difference solvers on a range of computer architectures"
    - "cross loop optimization of arithmetic intensity for finite element local assembly"
    - "automated derivation of the adjoint of high level transient finite element programs"

Connected through hyperedge HE-2 (induced by source paper "devito an embedded domain specific language for finite differences and geophysical exploration"):
  with members:
    - "architecture and performance of devito a system for automated stencil computation"
    - "high level python abstractions for optimal checkpointing in inversion problems"
    - "performance prediction of finite difference solvers for different computer architectures"
    - "opensbli a framework for the automated derivation and parallel execution of finite difference solvers on a range of computer architectures"
    - "cross loop optimization of arithmetic intensity for finite element local assembly"
    - "automated derivation of the adjoint of high level transient finite element programs"

Connected through hyperedge HE-3 (induced by source paper "architecture and performance of devito a system for automated stencil computation"):
  with members:
    - "devito v3 1 0 an embedded domain specific language for finite differences and geophysical exploration"
    - "performance prediction of finite difference solvers for different computer architectures"
    - "opensbli a framework for the automated derivation and parallel execution of finite difference solvers on a range of computer architectures"
    - "a metric for performance portability"
    - "loo py transformation based code generation for gpus and cpus"

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.MS(Mathematical Software)