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: "subgraph isomorphism in planar graphs and related problems"
  Abstract: We solve the subgraph isomorphism problem in planar graphs in linear time, for any pattern of constant size. Our results are based on a technique of partitioning the planar graph into pieces of small tree-width, and applying dynamic programming within each piece. The same methods can be used to solve other planar graph problems including connectivity, diameter, girth, induced subgraph isomorphism, and shortest paths.

Connected through hyperedge HE-1 (induced by source paper "a survey on subgraph counting concepts algorithms and applications to network motifs and graphlets"):
  with members:
    - "heterogeneous network motifs"
    - "variational principle for scale free network motifs"
    - "the sketching complexity of graph and hypergraph counting"
    - "motifs in temporal networks"
    - "large scale network motif learning with compression"
    - "butterfly counting in bipartite networks"
    - "estimation of graphlet statistics"
    - "combinatorial algorithm for counting small induced graphs and orbits"

Connected through hyperedge HE-2 (induced by source paper "minimum cuts in surface graphs"):
  with members:
    - "holiest minimum cost paths and flows in surface graphs"
    - "computational topology and the unique games conjecture"
    - "finding all useless arcs in directed planar graphs"
    - "local flow partitioning for faster edge connectivity"
    - "minor free graphs have light spanners"
    - "minimum cycle and homology bases of surface embedded graphs"
    - "recognizing weakly simple polygons"
    - "fully polynomial time parameterized computations for graphs and matrices of low treewidth"

Connected through hyperedge HE-3 (induced by source paper "detecting and counting small patterns in planar graphs in subexponential parameterized time"):
  with members:
    - "homomorphisms are a good basis for counting small subgraphs"
    - "computing the number of induced copies of a fixed graph in a bounded degree graph"
    - "subexponential parameterized algorithms for planar and apex minor free graphs via low treewidth pattern covering"
    - "counting matchings with k unmatched vertices in planar graphs"
    - "approximating the partition function of planar two state spin systems"
    - "on triangulating k outerplanar graphs"
    - "approximate counting via correlation decay on planar graphs"
    - "beyond bidimensionality parameterized subexponential algorithms on directed graphs"

Connected through hyperedge HE-4 (induced by source paper "counting and finding homomorphisms is universal for parameterized complexity theory"):
  with members:
    - "counting answers to existential questions"
    - "parameterized intractability of even set and shortest vector problem from gap eth"
    - "homomorphisms are a good basis for counting small subgraphs"
    - "a dichotomy theorem for nonuniform csps"
    - "complexity of counting subgraphs only the boundedness of the vertex cover number counts"
    - "complexity of counting csp with complex weights"
    - "deciding first order properties of locally tree decomposable structures"

Connected through hyperedge HE-5 (induced by source paper "subgraph isomorphism on graph classes that exclude a substructure"):
  with members:
    - "tight lower bounds on graph embedding problems"
    - "characterizing the easy to find subgraphs from the viewpoint of polynomial time algorithms kernels and turing kernels"
    - "on the computational complexity of vertex integrity and component order connectivity"
    - "everything you always wanted to know about the parameterized complexity of subgraph isomorphism but were afraid to ask"
    - "surface split decompositions and subgraph isomorphism in graphs on surfaces"
    - "planar subgraph isomorphism revisited"

Connected through hyperedge HE-6 (induced by source paper "finding hexahedrizations for small quadrangulations of the sphere"):
  with members:
    - "a 36 element solution to schneiders pyramid hex meshing problem and a parity changing template for hex mesh revision"
    - "a 44 element mesh of schneiders pyramid bounding the difficulty of hex meshing problems"
    - "identifying combinations of tetrahedra into hexahedra a vertex based strategy"
    - "gpu accelerated spectral finite elements on all hex meshes"
    - "flipping cubical meshes"
    - "linear complexity hexahedral mesh generation"

Connected through hyperedge HE-7 (induced by source paper "approximation algorithms for min distance problems"):
  with members:
    - "towards tight approximation bounds for graph diameter and eccentricities"
    - "faster all pairs shortest paths via circuit complexity"
    - "approximating the diameter of planar graphs in near linear time"
    - "computing the diameter polynomially faster than apsp"

Connected through hyperedge HE-8 (induced by source paper "new techniques for graph edit distance computation"):
  with members:
    - "linear sum assignment with edition"
    - "powers of tensors and fast matrix multiplication"
    - "practical graph isomorphism ii"

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.DS(Data Structures and Algorithms)