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: "proof theory at work complexity analysis of term rewrite systems"
  Abstract: This thesis is concerned with investigations into the "complexity of term rewriting systems". Moreover the majority of the presented work deals with the "automation" of such a complexity analysis. The aim of this introduction is to present the main ideas in an easily accessible fashion to make the result presented accessible to the general public. Necessarily some technical points are stated in an over-simplified way.

Connected through hyperedge HE-1 (induced by source paper "a combination framework for complexity"):
  with members:
    - "polynomial path orders"
    - "on constructor rewrite systems and the lambda calculus"
    - "bounded termination of monotonicity constraint transition systems"
    - "a new order theoretic characterisation of the polytime computable functions"
    - "efficient csl model checking using stratification"
    - "polynomial path orders a maximal model"
    - "automated complexity analysis based on the dependency pair method"
    - "monotonicity constraints for termination in the integer domain"

Connected through hyperedge HE-2 (induced by source paper "a new order theoretic characterisation of the polytime computable functions"):
  with members:
    - "a combination framework for complexity"
    - "polynomial path orders"
    - "on constructor rewrite systems and the lambda calculus"
    - "polynomial path orders a maximal model"
    - "automated complexity analysis based on the dependency pair method"
    - "representations of stream processors using nested fixed points"
    - "on tiered small jump operators"
    - "a new function algebra of exptime functions by safe nested recursion"

Connected through hyperedge HE-3 (induced by source paper "polynomial path orders a maximal model"):
  with members:
    - "on constructor rewrite systems and the lambda calculus"
    - "automated complexity analysis based on the dependency pair method"
    - "the derivational complexity induced by the dependency pair method"
    - "dependency pairs and polynomial path orders"
    - "satisfying kbo constraints"

Connected through hyperedge HE-4 (induced by source paper "a complexity preserving transformation from jinja bytecode to rewrite systems"):
  with members:
    - "a combination framework for complexity"
    - "automated complexity analysis based on the dependency pair method"

Connected through hyperedge HE-5 (induced by source paper "a path order for rewrite systems that compute exponential time functions technical report"):
  with members:
    - "automated complexity analysis based on the dependency pair method"
    - "a new function algebra of exptime functions by safe nested recursion"

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.LO(Logic in Computer Science)