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: "solution of nonlinear stokes equations discretized by high order finite elements on nonconforming and anisotropic meshes with application to ice sheet dynamics"
  Abstract: Motivated by the need for efficient and accurate simulation of the dynamics of the polar ice sheets, we design high-order finite element discretizations and scalable solvers for the solution of nonlinear incompressible Stokes equations. In particular, we focus on power-law, shear thinning rheologies commonly used in modeling ice dynamics and other geophysical flows. We use nonconforming hexahedral meshes and the conforming inf-sup stable finite element velocity-pressure pairings $\mathbb{Q}_k \times \mathbb{Q}^{disc}_{k-2}$ or $\mathbb{Q}_k \times \mathbb{P}^{disc}_{k-1}$, where $k\ge 2$ is the polynomial order of the velocity space. To solve the nonlinear equations, we propose a Newton--Krylov method with a block upper triangular preconditioner for the linearized Stokes systems. The diagonal blocks of this preconditioner are sparse approximations of the (1,1)-block and of its Schur complement. The (1,1)-block is approximated using linear finite elements based on the nodes of the high-order discretization...

Connected through hyperedge HE-1 (induced by source paper "high level implementation of geometric multigrid solvers for finite element problems applications in atmospheric modelling"):
  with members:
    - "firedrake automating the finite element method by composing abstractions"
    - "an algorithm for the optimization of finite element integration loops"
    - "acceleration of a full scale industrial cfd application with op2"
    - "cross loop optimization of arithmetic intensity for finite element local assembly"
    - "petascale elliptic solvers for anisotropic pdes on gpu clusters"
    - "massively parallel solvers for elliptic pdes in numerical weather and climate prediction"
    - "unified form language a domain specific language for weak formulations of partial differential equations"
    - "dolfin automated finite element computing"

Connected through hyperedge HE-2 (induced by source paper "a numbering algorithm for finite element on extruded meshes which avoids the unstructured mesh penalty"):
  with members:
    - "firedrake automating the finite element method by composing abstractions"
    - "efficient mesh management in firedrake using petsc dmplex"
    - "cross loop optimization of arithmetic intensity for finite element local assembly"
    - "mesh algorithms for pde with sieve i mesh distribution"

Connected through hyperedge HE-3 (induced by source paper "a structure exploiting numbering algorithm for finite elements on extruded meshes and its performance evaluation in firedrake"):
  with members:
    - "firedrake automating the finite element method by composing abstractions"
    - "efficient mesh management in firedrake using petsc dmplex"
    - "cross loop optimization of arithmetic intensity for finite element local assembly"
    - "mesh algorithms for pde with sieve i mesh distribution"

Connected through hyperedge HE-4 (induced by source paper "extreme scale multigrid components within petsc"):
  with members:
    - "massively parallel solvers for elliptic pdes in numerical weather and climate prediction"

Connected through hyperedge HE-5 (induced by source paper "strong scaling for numerical weather prediction at petascale with the atmospheric model numa"):
  with members:
    - "recursive algorithms for distributed forests of octrees"

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)