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: "a new function algebra of exptime functions by safe nested recursion"
  Abstract: Bellantoni and Cook have given a function-algebra characterization of the polynomial-time computable functions via an unbounded recursion scheme which is called safe recursion. Inspired by their work, we characterize the exponential-time computable functions with the use of a safe variant of nested recursion.

Connected through hyperedge HE-1 (induced by source paper "on sharing memoization and polynomial time long version"):
  with members:
    - "automated complexity analysis based on the dependency pair method"

Connected through hyperedge HE-2 (induced by source paper "a new term rewriting characterisation of etime functions"):
  with members:
    - "a new order theoretic characterisation of the polytime computable functions"

Connected through hyperedge HE-3 (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"
    - "proof theory at work complexity analysis of term rewrite systems"
    - "on tiered small jump operators"

Connected through hyperedge HE-4 (induced by source paper "a formalization of polytime functions"):
  with members:
    - "on formal verification of arithmetic based cryptographic primitives"

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"
    - "proof theory at work complexity analysis of term rewrite systems"

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)