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: "algebraic geometric matrix free multigrid on dynamically adaptive cartesian meshes"
  Abstract: We introduce a family of spacetree-based multigrid solvers that do not maintain a matrix data structure and rely on the spacetree's multiscale nature to derive coarse grids. The most sophisticated solvers from the family pick up the concept of BoxMG, which defines operator-dependent prolongation and restriction in combination with (Petrov-)Galerkin coarse grid operators. It yields robust solvers for nontrivial elliptic problems. We propose to embed the algebraic, problem- and grid-dependent multigrid operators as stencils into the grids, to evaluate all matrix-vector products in-situ throughout grid traversals, and, thus, to avoid assembly overhead that is notably cumbersome for dynamically adaptive grids. While such an approach is not literally matrix-free---the grid carries the matrix---we propose switch to a hierarchical two-scale representation of all operators. Only differences of algebraic operators to their geometric counterparts are held. These hierarchical differences can be held and exchanged with small memory footprint. Our solvers support arbitrary dynamically adaptive grids and vertically integrate the multilevel operations through spacetree linearisation which yields good memory access characteristics, while standard colouring of mesh entities with a multiscale domain decomposition allow us to run the scheme on parallel computers.

Connected through hyperedge HE-1 (induced by source paper "the peano software parallel automaton based dynamically adaptive grid traversals"):
  with members:
    - "stop talking to me a communication avoiding ader dg realisation"
    - "quasi matrix free hybrid multigrid on dynamically adaptive cartesian grids"
    - "complex additive geometric multilevel solvers for helmholtz equations on spacetrees"
    - "two particle in grid realisations on spacetrees"
    - "how many three dimensional hilbert curves are there"
    - "morton curve segments produce no more than two distinct face connected subdomains"
    - "bounds on the number of discontinuities of morton type space filling curves"
    - "a survey of high level frameworks in block structured adaptive mesh refinement packages"

Connected through hyperedge HE-2 (induced by source paper "a high level characterisation and generalisation of communication avoiding programming techniques"):
  with members:
    - "parallel performance of algebraic multigrid domain decomposition amg dd"
    - "stop talking to me a communication avoiding ader dg realisation"
    - "enclave tasking for discontinuous galerkin methods on dynamically adaptive meshes"
    - "two particle in grid realisations on spacetrees"
    - "swift using task based parallelism fully asynchronous communication and graph partition based domain decomposition for strong scaling on more than 100 000 cores"
    - "asynchronous mpi for the masses"

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)