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: "potential maximal clique algorithms for perfect phylogeny problems"
  Abstract: Kloks, Kratsch, and Spinrad showed how treewidth and minimum-fill, NP-hard#N#         combinatorial optimization problems related to minimal triangulations, are broken into#N#         subproblems by block subgraphs defined by minimal separators. These ideas were expanded on#N#         by Bouchitt  #x27;e and Todinca, who used potential maximal cliques to solve these problems#N#         using a dynamic programming approach in time polynomial in the number of minimal separators#N#         of a graph. It is known that solutions to the perfect phylogeny problem, maximum#N#         compatibility problem, and unique perfect phylogeny problem are characterized by minimal#N#         triangulations of the partition intersection graph. In this paper, we show that techniques#N#         similar to those proposed by Bouchitt  #x27;e and Todinca can be used to solve the perfect#N#         phylogeny problem with missing data, the two- state maximum compatibility problem with#N#         missing data, and the unique perfect phylogeny problem with missing data in time polynomial#N#         in the number of minimal separators of the partition intersection graph.

Connected through hyperedge HE-1 (induced by source paper "algorithms parameterized by vertex cover and modular width through potential maximal cliques"):
  with members:
    - "a faster parameterized algorithm for treedepth"
    - "parameterized algorithms for modular width"
    - "large induced subgraphs via triangulations and cmso"
    - "finding induced subgraphs via minimal triangulations"
    - "treewidth computation and extremal combinatorics"

Connected through hyperedge HE-2 (induced by source paper "unique perfect phylogeny characterizations via uniquely representable chordal graphs"):
  with members:
    - "boundary cliques clique trees and perfect sequences of maximal cliques of a chordal graph"

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.DM(Discrete Mathematics)