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: "succinctness of the complement and intersection of regular expressions"
  Abstract: We study the succinctness of the complement and intersection of regular expressions. In particular, we show that when constructing a regular expression defining the complement of a given regular expression, a double exponential size increase cannot be avoided. Similarly, when constructing a regular expression defining the intersection of a fixed and an arbitrary number of regular expressions, an exponential and double exponential size increase, respectively, can in worst-case not be avoided. All mentioned lower bounds improve the existing ones by one exponential and are tight in the sense that the target expression can be constructed in the corresponding time class, i.e., exponential or double exponential time. As a by-product, we generalize a theorem by Ehrenfeucht and Zeiger stating that there is a class of DFAs which are exponentially more succinct than regular expressions, to a fixed four-letter alphabet. When the given regular expressions are one-unambiguous, as for instance required by the XML Schema specification, the complement can be computed in polynomial time whereas the bounds concerning intersection continue to hold. For the subclass of single-occurrence regular expressions, we prove a tight exponential lower bound for intersection.

Connected through hyperedge HE-1 (induced by source paper "from finite automata to regular expressions and back a summary on descriptional complexity"):
  with members:
    - "a faster parameterized algorithm for treedepth"
    - "incomplete transition complexity of basic operations on finite languages"
    - "enumerating regular expressions and their languages"
    - "state elimination ordering strategies some experimental results"
    - "regular expressions au point"
    - "transition complexity of incomplete dfas"
    - "unary finite automata vs arithmetic progressions"

Connected through hyperedge HE-2 (induced by source paper "on k piecewise testability preliminary report"):
  with members:
    - "on the index of simon s congruence for piecewise testability"
    - "separating regular languages by piecewise testable and unambiguous languages"
    - "around dot depth one"

Connected through hyperedge HE-3 (induced by source paper "learning deterministic regular expressions for the inference of schemas from xml data"):
  with members:
    - "on the complexity of xpath containment in the presence of disjunction dtds and variables"
    - "schema based scheduling of event processors and buffer minimization for queries on structured data streams"

Connected through hyperedge HE-4 (induced by source paper "parikh images of regular languages complexity and applications"):
  with members:
    - "algorithmic metatheorems for decidable ltl model checking over infinite 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)