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: "homomorphism reconfiguration via homotopy"
  Abstract: We consider the following problem for a fixed graph H: given a graph G and two H-colorings of G, i.e. homomorphisms from G to H, can one be transformed (reconfigured) into the other by changing one color at a time, maintaining an H-coloring throughout. This is the same as finding a path in the Hom(G,H) complex. For H=K_k this is the problem of finding paths between k-colorings, which was shown to be in P for k<=3 and PSPACE-complete otherwise by Cereceda et al. 2011. We generalize the positive side of this dichotomy by providing an algorithm that solves the problem in polynomial time for any H with no C_4 subgraph. This gives a large class of constraints for which finding solutions to the Constraint Satisfaction Problem is NP-complete, but finding paths in the solution space is P. #R##N#The algorithm uses a characterization of possible reconfiguration sequences (paths in Hom(G,H)), whose main part is a purely topological condition described in algebraic terms of the fundamental groupoid of H seen as a topological space.

Connected through hyperedge HE-1 (induced by source paper "the complexity of independent set reconfiguration on bipartite graphs"):
  with members:
    - "polynomial time algorithms for sliding tokens on cactus graphs and block graphs"
    - "token sliding on chordal graphs"
    - "reconfiguration on sparse graphs"
    - "reconfiguring independent sets in claw free graphs"
    - "vertex cover reconfiguration and beyond"
    - "shortest reconfiguration paths in the solution space of boolean formulas"
    - "reconfiguration in bounded bandwidth and treedepth"
    - "on the parameterized complexity of reconfiguration problems"

Connected through hyperedge HE-2 (induced by source paper "parameterized complexity of the list coloring reconfiguration problem with graph parameters"):
  with members:
    - "the list coloring reconfiguration problem for bounded pathwidth graphs"
    - "finding shortest paths between graph colourings"
    - "reconfiguration in bounded bandwidth and treedepth"
    - "recoloring bounded treewidth graphs"
    - "parameterized algorithms for modular width"
    - "the complexity of change"

Connected through hyperedge HE-3 (induced by source paper "using contracted solution graphs for solving reconfiguration problems"):
  with members:
    - "recognizing graphs close to bipartite graphs with an application to colouring reconfiguration"
    - "parameterized complexity of the list coloring reconfiguration problem with graph parameters"
    - "parameterized complexity of graph constraint logic"
    - "the complexity of dominating set reconfiguration"
    - "a reconfigurations analogue of brooks theorem and its consequences"
    - "the list coloring reconfiguration problem for bounded pathwidth graphs"
    - "reconfiguration on sparse graphs"
    - "reconfiguring independent sets in claw free graphs"

Connected through hyperedge HE-4 (induced by source paper "degree constrained subgraph reconfiguration is in p"):
  with members:
    - "the complexity of change"
    - "the complexity of rerouting shortest paths"

Connected through hyperedge HE-5 (induced by source paper "finding shortest paths between graph colourings"):
  with members:
    - "reconfiguring independent sets in claw free graphs"
    - "vertex cover reconfiguration and beyond"
    - "independent set reconfiguration in cographs"
    - "recoloring bounded treewidth graphs"
    - "on the parameterized complexity of reconfiguration problems"
    - "the complexity of change"
    - "kernelization lower bounds by cross composition"
    - "rerouting shortest paths in planar graphs"

Connected through hyperedge HE-6 (induced by source paper "recoloring graphs via tree decompositions"):
  with members:
    - "a linear algorithm for the grundy number of a tree"
    - "recoloring bounded treewidth graphs"
    - "the connectivity of boolean satisfiability computational and structural dichotomies"

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.CC(Computational Complexity)