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: "the power of priority channel systems"
  Abstract: We introduce Priority Channel Systems, a new class of channel systems where#N#messages carry a numeric priority and where higher-priority messages can#N#supersede lower-priority messages preceding them in the fifo communication#N#buffers. The decidability of safety and inevitability properties is shown via#N#the introduction of a priority embedding, a well-quasi-ordering that has not#N#previously been used in well-structured systems. We then show how Priority#N#Channel Systems can compute Fast-Growing functions and prove that the#N#aforementioned verification problems are#N#$\mathbf{F}_{\varepsilon_{0}}$-complete.

Connected through hyperedge HE-1 (induced by source paper "the ideal approach to computing closed subsets in well quasi orderings"):
  with members:
    - "mixed powerdomains for probability and nondeterminism"
    - "well behaved transition systems"
    - "complexity hierarchies beyond elementary"
    - "demystifying reachability in vector addition systems"
    - "finite automata for the sub and superword closure of cfls descriptional and computational complexity"
    - "complexity bounds for ordinal based termination"
    - "computing downward closures for stacked counter automata"
    - "the power of well structured systems"

Connected through hyperedge HE-2 (induced by source paper "on functions weakly computable by pushdown petri nets and related systems"):
  with members:
    - "reachability in vector addition systems is primitive recursive in fixed dimension"
    - "the reachability problem for petri nets is not elementary"
    - "reasoning about data repetitions with counter systems"
    - "complexity hierarchies beyond elementary"
    - "on boundedness problems for pushdown vector addition systems"
    - "on the coverability problem for pushdown vector addition systems in one dimension"
    - "the reachability problem for vector addition systems with a stack is not elementary"
    - "approximating petri net reachability along context free traces"

Connected through hyperedge HE-3 (induced by source paper "decidability complexity and expressiveness of first order logic over the subword ordering"):
  with members:
    - "on the state complexity of closures and interiors of regular languages with subwords and superwords"
    - "decidability in the logic of subsequences and supersequences"
    - "generalized post embedding problems"
    - "the height of piecewise testable languages with applications in logical complexity"
    - "subclasses of presburger arithmetic and the weak exp hierarchy"
    - "recompression a simple and powerful technique for word equations"

Connected through hyperedge HE-4 (induced by source paper "complexity hierarchies beyond elementary"):
  with members:
    - "relating timed and register automata"
    - "demystifying reachability in vector addition systems"
    - "nonelementary complexities for branching vass mell and extensions"
    - "on freeze ltl with ordered attributes"
    - "trace inclusion for one counter nets revisited"
    - "the parametric ordinal recursive complexity of post embedding problems"
    - "graph logics with rational relations"
    - "senescent ground tree rewrite systems"

Connected through hyperedge HE-5 (induced by source paper "on the state complexity of closures and interiors of regular languages with subwords and superwords"):
  with members:
    - "decidability in the logic of subsequences and supersequences"
    - "refinement and difference for probabilistic automata"
    - "finite automata for the sub and superword closure of cfls descriptional and computational complexity"
    - "alternating towers and piecewise testable separators"
    - "computing downward closures for stacked counter automata"
    - "quotient complexity of ideal languages"
    - "decision problems for convex languages"
    - "the computational complexity of universality problems for prefixes suffixes factors and subwords of regular languages"

Connected through hyperedge HE-6 (induced by source paper "on freeze ltl with ordered attributes"):
  with members:
    - "reasoning about data repetitions with counter systems"
    - "complexity hierarchies beyond elementary"
    - "demystifying reachability in vector addition systems"
    - "ordered navigation on multi attributed data words"
    - "alternating register automata on finite words and trees"
    - "temporal logics on words with multiple data values"
    - "ltl with the freeze quantifier and register automata"
    - "on the freeze quantifier in constraint ltl decidability and complexity"

Connected through hyperedge HE-7 (induced by source paper "decidability in the logic of subsequences and supersequences"):
  with members:
    - "generalized post embedding problems"

Connected through hyperedge HE-8 (induced by source paper "the power of well structured systems"):
  with members:
    - "complexity hierarchies beyond elementary"
    - "graph logics with rational relations"
    - "parameterized verification of asynchronous shared memory systems"
    - "forward analysis for wsts part ii complete wsts"
    - "alternating register automata on finite words and trees"
    - "ackermannian and primitive recursive bounds with dickson s lemma"
    - "multiply recursive upper bounds with higman s lemma"
    - "alternating automata on data trees and xpath satisfiability"

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)