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: "difference constraints an adequate abstraction for complexity analysis of imperative programs"
  Abstract: Difference constraints have been used for termination analysis in the literature, where they denote relational inequalities of the form x' <= y + c, and describe that the value of x in the current state is at most the value of y in the previous state plus some integer constant c. In this paper, we argue that the complexity of imperative programs typically arises from counter increments and resets, which can be modeled naturally by difference constraints. We present the first practical algorithm for the analysis of difference constraint programs and describe how C programs can be abstracted to difference constraint programs. Our approach contributes to the field of automated complexity and (resource) bound analysis by enabling automated amortized complexity analysis for a new class of programs and providing a conceptually simple program model that relates invariant- and bound analysis. We demonstrate the effectiveness of our approach through a thorough experimental comparison on real world C code: our tool Loopus computes the complexity for considerably more functions in less time than related tools from the literature.

Connected through hyperedge HE-1 (induced by source paper "the polynomial complexity of vector addition systems with states"):
  with members:
    - "efficient algorithms for asymptotic bounds on termination time in vass"
    - "liveness of parameterized timed networks"
    - "a simple and scalable static analysis for bound analysis and amortized complexity analysis"

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.PL(Programming Languages)