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: "fixed parameter and approximation algorithms for maximum agreement forests of multifurcating trees"
  Abstract: We present efficient algorithms for computing a maximum agreement forest (MAF) of a pair of multifurcating (nonbinary) rooted trees. Our algorithms match the running times of the currently best algorithms for the binary case. The size of an MAF corresponds to the subtree prune-and-regraft (SPR) distance of the two trees and is intimately connected to their hybridization number. These distance measures are essential tools for understanding reticulate evolution, such as lateral gene transfer, recombination, and hybridization. Multifurcating trees arise naturally as a result of statistical uncertainty in current tree construction methods.

Connected through hyperedge HE-1 (induced by source paper "parameterized algorithms for the maximum agreement forest problem on multiple rooted multifurcating trees"):
  with members:
    - "a duality based 2 approximation algorithm for maximum agreement forest"
    - "a 3 factor approximation algorithm for a minimum acyclic agreement forest on k rooted binary phylogenetic trees"

Connected through hyperedge HE-2 (induced by source paper "chain reduction preserves the unrooted subtree prune and regraft distance"):
  with members:
    - "ricci ollivier curvature of the rooted phylogenetic subtree prune regraft graph"

Connected through hyperedge HE-3 (induced by source paper "calculating the unrooted subtree prune and regraft distance"):
  with members:
    - "chain reduction preserves the unrooted subtree prune and regraft distance"
    - "ricci ollivier curvature of the rooted phylogenetic subtree prune regraft 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.DS(Data Structures and Algorithms)