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: "one variable word equations in linear time"
  Abstract: In this paper we consider word equations with one variable (and arbitrary many appearances of it). A recent technique of recompression, which is applicable to general word equations, is shown to be suitable also in this case. While in general case it is non-deterministic, it determinises in case of one variable and the obtained running time is O(n + #_X log n), where #_X is the number of appearances of the variable in the equation. This matches the previously-best algorithm due to D\k{a}browski and Plandowski. Then, using a couple of heuristics as well as more detailed time analysis the running time is lowered to O(n) in RAM model. Unfortunately no new properties of solutions are shown.

Connected through hyperedge HE-1 (induced by source paper "matching patterns with variables"):
  with members:
    - "graph and string parameters connections between pathwidth cutwidth and the locality number"
    - "quadratic word equations with length constraints counter systems and presburger arithmetic with divisibility"
    - "the hardness of solving simple word equations"
    - "the runs theorem"
    - "decidability complexity and expressiveness of first order logic over the subword ordering"
    - "detecting one variable patterns"
    - "solutions of word equations over partially commutative structures"
    - "a parameterized study of maximum generalized pattern matching problems"

Connected through hyperedge HE-2 (induced by source paper "m bonsai a practical compact dynamic trie"):
  with members:
    - "from theory to practice plug and play with succinct data structures"
    - "the wavelet trie maintaining an indexed sequence of strings in compressed space"
    - "cram compressed random access memory"

Connected through hyperedge HE-3 (induced by source paper "longest common extensions with recompression"):
  with members:
    - "in place longest common extensions"
    - "finger search in grammar compressed strings"
    - "fingerprints in compressed strings"
    - "approximation of grammar based compression via recompression"
    - "approximation of smallest linear tree grammar"
    - "recompression a simple and powerful technique for word equations"
    - "faster fully compressed pattern matching by recompression"

Connected through hyperedge HE-4 (induced by source paper "approximation of grammar based compression via recompression"):
  with members:
    - "the complexity of compressed membership problems for finite automata"
    - "approximation of smallest linear tree grammar"
    - "recompression a simple and powerful technique for word equations"
    - "pattern matching in lempel ziv compressed strings fast simple and deterministic"
    - "faster fully compressed pattern matching by recompression"
    - "identifying hierarchical structure in sequences a linear time algorithm"

Connected through hyperedge HE-5 (induced by source paper "context unification is in pspace"):
  with members:
    - "approximation of grammar based compression via recompression"
    - "approximation of smallest linear tree grammar"
    - "recompression a simple and powerful technique for word equations"
    - "faster fully compressed pattern matching by recompression"
    - "the existential theory of equations with rational constraints in free groups is pspace complete"

Connected through hyperedge HE-6 (induced by source paper "recompression a simple and powerful technique for word equations"):
  with members:
    - "the complexity of compressed membership problems for finite automata"
    - "a really simple approximation of smallest grammar"
    - "finding all solutions of equations in free groups and monoids with involution"
    - "approximation of grammar based compression via recompression"
    - "approximation of smallest linear tree grammar"
    - "context unification is in pspace"
    - "faster fully compressed pattern matching by recompression"

Connected through hyperedge HE-7 (induced by source paper "faster fully compressed pattern matching by recompression"):
  with members:
    - "the complexity of compressed membership problems for finite automata"
    - "approximation of grammar based compression via recompression"
    - "approximation of smallest linear tree grammar"
    - "context unification is in pspace"
    - "recompression a simple and powerful technique for word equations"
    - "tying up the loose ends in fully lzw compressed pattern matching"
    - "pattern matching in lempel ziv compressed strings fast simple and deterministic"
    - "identifying hierarchical structure in sequences a linear time algorithm"

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.FL(Formal Languages and Automata Theory)