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: "new insights in boundary only and domain type rbf methods"
  Abstract: This paper has made some significant advances in the boundary-only and domain-type RBF techniques. The proposed boundary knot method (BKM) is different from the standard boundary element method in a number of important aspects. Namely, it is truly meshless, exponential convergence, integration-free (of course, no singular integration), boundary-only for general problems, and leads to symmetric matrix under certain conditions (able to be extended to general cases after further modified). The BKM also avoids the artificial boundary in the method of fundamental solution. An amazing finding is that the BKM can formulate linear modeling equations for nonlinear partial differential systems with linear boundary conditions. This merit makes it circumvent all perplexing issues in the iteration solution of nonlinear equations. On the other hand, by analogy with Green's second identity, we also presents a general solution RBF (GSR) methodology to construct efficient RBFs in the domain-type RBF collocation method and dual reciprocity method. The GSR approach first establishes an explicit relationship between the BEM and RBF itself on the ground of the potential theory. This paper also discusses some essential issues relating to the RBF computing, which include time-space RBFs, direct and indirect RBF schemes, finite RBF method, and the application of multipole and wavelet to the RBF solution of the PDEs.

Connected through hyperedge HE-1 (induced by source paper "new rbf collocation methods and kernel rbf with applications"):
  with members:
    - "boundary knot method for laplace and biharmonic problems"
    - "rbf based meshless boundary knot method and boundary particle method"
    - "relationship between boundary integral equation and radial basis function"
    - "several new domain type and boundary type numerical discretization schemes with radial basis function"

Connected through hyperedge HE-2 (induced by source paper "rbf based meshless boundary knot method and boundary particle method"):
  with members:
    - "a meshless integration free and boundary only rbf technique"
    - "several new domain type and boundary type numerical discretization schemes with radial basis function"

Connected through hyperedge HE-3 (induced by source paper "relationship between boundary integral equation and radial basis function"):
  with members:
    - "new advances in dual reciprocity and boundary only rbf methods"
    - "a meshless integration free and boundary only rbf technique"

Connected through hyperedge HE-4 (induced by source paper "orthonormal rbf wavelet and ridgelet like series and transforms for high dimensional problems"):
  with members:
    - "relationship between boundary integral equation and radial basis function"

Connected through hyperedge HE-5 (induced by source paper "several new domain type and boundary type numerical discretization schemes with radial basis function"):
  with members:
    - "orthonormal rbf wavelet and ridgelet like series and transforms for high dimensional problems"
    - "relationship between boundary integral equation and radial basis function"

Connected through hyperedge HE-6 (induced by source paper "a note on radial basis function computing"):
  with members:
    - "a meshless integration free and boundary only rbf technique"

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.CE(Computational Engineering, Finance, and Science)