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: "efficient spacetime meshing with nonlocal cone constraints"
  Abstract: Spacetime Discontinuous Galerkin (DG) methods are used to solve hyperbolic PDEs describing wavelike physical phenomena. When the PDEs are nonlinear, the speed of propagation of the phenomena, called the wavespeed, at any point in the spacetime domain is computed as part of the solution. We give an advancing front algorithm to construct a simplicial mesh of the spacetime domain suitable for DG solutions. Given a simplicial mesh of a bounded linear or planar space domain M, we incrementally construct a mesh of the spacetime domain M x [0,infinity) such that the solution can be computed in constant time per element. We add a patch of spacetime elements to the mesh at every step. The boundary of every patch is causal which means that the elements in the patch can be solved immediately and that the patches in the mesh are partially ordered by dependence. The elements in a single patch are coupled because they share implicit faces; however, the number of elements in each patch is bounded. The main contribution of this paper is sufficient constraints on the progress in time made by the algorithm at each step which guarantee that a new patch with causal boundary can be added to the mesh at every step even when the wavespeed is increasing discontinuously. Our algorithm adapts to the local gradation of the space mesh as well as the wavespeed that most constrains progress at each step. Previous algorithms have been restricted at each step by the maximum wavespeed throughout the entire spacetime domain.

Connected through hyperedge HE-1 (induced by source paper "spacetime meshing for discontinuous galerkin methods"):
  with members:
    - "building space time meshes over arbitrary spatial domains"
    - "optimal point placement for mesh smoothing"

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.CG(Computational Geometry)