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: "notes on order preservation and consistency in ahp"
  Abstract: The pairwise comparisons method is a convenient tool used when the relative order among different concepts (alternatives) needs to be determined. One popular implementation of the method is based on solving an eigenvalue problem for the pairwise comparisons matrix. In such cases the ranking result for the principal eigenvector of the pairwise comparisons matrix is adopted, while the eigenvalue is used to determine the index of inconsistency. A lot of research has been devoted to the critical analysis of the eigenvalue based approach. One of them is the work of Bana e Costa and Vansnick (2008). In their work, the authors define the conditions of order preservation (COP) and show that even for sufficiently consistent pairwise comparisons matrices, this condition cannot be met. The presented work defines more precise criteria for determining when the COP is met. To formulate the criteria, an error factor is used describing how far the input to the ranking procedure is from the ranking result. The relationship between the Saaty consistency index and COP is also discussed.

Connected through hyperedge HE-1 (induced by source paper "satisfaction of the condition of order preservation a simulation study"):
  with members:
    - "studying a set of properties of inconsistency indices for pairwise comparisons"
    - "axiomatic properties of inconsistency indices for pairwise comparisons"

Connected through hyperedge HE-2 (induced by source paper "when condition of order preservation is met"):
  with members:
    - "on the properties of the priority deriving procedure in the pairwise comparisons method"
    - "heuristic rating estimation geometric approach"
    - "heuristic rating estimation approach to the pairwise comparisons method"
    - "on axiomatization of inconsistency indicators for pairwise comparisons"

Connected through hyperedge HE-3 (induced by source paper "when is the condition of order preservation met"):
  with members:
    - "on the properties of the priority deriving procedure in the pairwise comparisons method"
    - "heuristic rating estimation geometric approach"
    - "heuristic rating estimation approach to the pairwise comparisons method"
    - "on axiomatization of inconsistency indicators for pairwise comparisons"

Connected through hyperedge HE-4 (induced by source paper "studying a set of properties of inconsistency indices for pairwise comparisons"):
  with members:
    - "boundary properties of the inconsistency of pairwise comparisons in group decisions"
    - "axiomatic properties of inconsistency indices for pairwise comparisons"
    - "managing null entries in pairwise comparisons"
    - "on axiomatization of inconsistency indicators for pairwise comparisons"

Connected through hyperedge HE-5 (induced by source paper "new results on inconsistency indices and their relationship with the quality of priority vector estimation"):
  with members:
    - "boundary properties of the inconsistency of pairwise comparisons in group decisions"
    - "axiomatic properties of inconsistency indices for pairwise comparisons"
    - "on axiomatization of inconsistency indicators for pairwise comparisons"
    - "an lp based inconsistency monitoring of pairwise comparison matrices"
    - "on distance based inconsistency reduction algorithms for pairwise comparisons"

Connected through hyperedge HE-6 (induced by source paper "recent advances on inconsistency indices for pairwise comparisons a commentary"):
  with members:
    - "axiomatic properties of inconsistency indices for pairwise comparisons"
    - "managing null entries in pairwise comparisons"

Connected through hyperedge HE-7 (induced by source paper "on the properties of the priority deriving procedure in the pairwise comparisons method"):
  with members:
    - "heuristic rating estimation geometric approach"
    - "heuristic rating estimation approach to the pairwise comparisons method"
    - "on axiomatization of inconsistency indicators for pairwise comparisons"
    - "on distance based inconsistency reduction algorithms for pairwise comparisons"

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)