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: "sorting of permutations by cost constrained transpositions"
  Abstract: We address the problem of finding the minimum decomposition of a permutation in terms of transpositions with non-uniform cost. For arbitrary non-negative cost functions, we describe polynomial-time, constant-approximation decomposition algorithms. For metric-path costs, we describe exact polynomial-time decomposition algorithms. Our algorithms represent a combination of Viterbi-type algorithms and graph-search techniques for minimizing the cost of individual transpositions, and dynamic programing algorithms for finding minimum cost cycle decompositions. The presented algorithms have applications in information theory, bioinformatics, and algebra.

Connected through hyperedge HE-1 (induced by source paper "fuzzy rankings properties and applications"):
  with members:
    - "sorting and selection with random costs"

Connected through hyperedge HE-2 (induced by source paper "complexity of token swapping and its variants"):
  with members:
    - "swapping colored tokens on graphs"
    - "complexity of finding perfect bipartite matchings minimizing the number of intersecting edges"
    - "subexponential time algorithms for finding small tree and path decompositions"
    - "approximation and hardness for token swapping"
    - "optimal parameterized algorithms for planar facility location problems using voronoi diagrams"
    - "linear time algorithm for sliding tokens on trees"
    - "deciding first order properties of nowhere dense graphs"

Connected through hyperedge HE-3 (induced by source paper "computing similarity distances between rankings"):
  with members:
    - "sorting and selection with random costs"

Connected through hyperedge HE-4 (induced by source paper "a novel distance based approach to constrained rank aggregation"):
  with members:
    - "nonuniform vote aggregation algorithms"
    - "constructions of rank modulation codes"

Connected through hyperedge HE-5 (induced by source paper "linear programming upper bounds on permutation code sizes from coherent configurations related to the kendall tau distance metric"):
  with members:
    - "codes in permutations and error correction for rank modulation"

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.IT(Information Theory)