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: "from event labeled gene trees with horizontal gene transfer to species trees"
  Abstract: Evolutionary event relations such as orthology, paralogy and xenology provide important information on the evolutionary history of the investigated genes. It has recently been shown that there is an event-labeled gene tree that displays estimated event relations if and only if the (graph-representation of these) relations are so-called cographs, resp., uniformly non-prime 2-structures. In particular, the respective event-labeled gene trees can then be constructed in polynomial time by utilizing solely the information of these event relations. #R##N#In this contribution, we are concerned with the next conceptual step: the derivation of a species tree from an event-labeled gene tree $T$ that contains horizontal gene transfer, speciation and duplication events. We show that there is a species tree $S$ for $T$ if and only if certain triples that are displayed in $T$ are also displayed in $S$. To this end, a reconciliation map from $T$ to $S$ is provided that is consistent with so-called DTL-scenarios. Moreover, we provide a polynomial-time algorithm to decide whether there is a species tree for a given gene tree, and in the positive case, to construct the species tree and the respective reconciliation map.

Connected through hyperedge HE-1 (induced by source paper "forbidden time travel characterization of time consistent tree reconciliation maps"):
  with members:
    - "from event labeled gene trees to species trees"
    - "the mathematics of xenology di cographs symbolic ultrametrics 2 structures and tree representable systems of binary relations"
    - "phylogenomics with paralogs"
    - "on symbolic ultrametrics cotree representations and cograph edge decompositions and partitions"
    - "on tree representations of relations and graphs symbolic ultrametrics and cograph edge decompositions"

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)