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: "rted a robust algorithm for the tree edit distance"
  Abstract: We consider the classical tree edit distance between ordered labeled trees, which is defined as the minimum-cost sequence of node edit operations that transform one tree into another. The state-of-the-art solutions for the tree edit distance are not satisfactory. The main competitors in the field either have optimal worst-case complexity, but the worst case happens frequently, or they are very efficient for some tree shapes, but degenerate for others. This leads to unpredictable and often infeasible runtimes. There is no obvious way to choose between the algorithms. In this paper we present RTED, a robust tree edit distance algorithm. The asymptotic complexity of RTED is smaller or equal to the complexity of the best competitors for any input instance, i.e., RTED is both efficient and worst-case optimal. We introduce the class of LRH (Left-Right-Heavy) algorithms, which includes RTED and the fastest tree edit distance algorithms presented in literature. We prove that RTED outperforms all previously proposed LRH algorithms in terms of runtime complexity. In our experiments on synthetic and real world data we empirically evaluate our solution and compare it to the state-of-the-art.

Connected through hyperedge HE-1 (induced by source paper "fixminer mining relevant fix patterns for automated program repair"):
  with members:
    - "d c a divide and conquer approach to ir based bug localization"
    - "tbar revisiting template based automated program repair"
    - "ifixr bug report driven program repair"
    - "avatar fixing semantic bugs with fix patterns of static analysis violations"
    - "automatic software repair a bibliography"
    - "automatic repair of real bugs in java a large scale experiment on the defects4j dataset"
    - "ultra large repair search space with automatically mined templates the cardumen mode of astor"
    - "you cannot fix what you cannot find an investigation of fault localization bias in benchmarking automated program repair systems"

Connected through hyperedge HE-2 (induced by source paper "improving the representation and conversion of mathematical formulae by considering their textual context"):
  with members:
    - "vmext a visualization tool for mathematical expression trees"
    - "interoperability in the opendreamkit project the math in the middle approach"
    - "growing the digital repository of mathematical formulae with generic latex sources"
    - "digital repository of mathematical formulae"
    - "mathoid robust scalable fast and accessible math rendering for wikipedia"
    - "branch cuts in maple 17"

Connected through hyperedge HE-3 (induced by source paper "revisiting the tree edit distance and its backtracing a tutorial"):
  with members:
    - "tree edit distance learning via adaptive symbol embeddings"
    - "the continuous hint factory providing hints in vast and sparsely populated edit distance spaces"

Connected through hyperedge HE-4 (induced by source paper "learning syntactic program transformations from examples"):
  with members:
    - "semi supervised verified feedback generation"
    - "automated feedback generation for introductory programming assignments"

Connected through hyperedge HE-5 (induced by source paper "ned an inter graph node metric based on edit distance"):
  with members:
    - "an automated social graph de anonymization technique"
    - "axiomatic ranking of network role similarity"

Connected through hyperedge HE-6 (induced by source paper "a review on the tree edit distance problem and related path decomposition algorithms"):
  with members:
    - "an optimal decomposition algorithm for tree edit distance"

Connected through hyperedge HE-7 (induced by source paper "event driven agility of interoperability during the run time of collaborative processes"):
  with members:
    - "an optimal decomposition algorithm for tree edit distance"

Connected through hyperedge HE-8 (induced by source paper "adtool security analysis with attack defense trees extended version"):
  with members:
    - "quantitative questions on attack defense trees"
    - "an optimal decomposition algorithm for tree edit distance"

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.DB(Databases)