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: "alternating register automata on finite words and trees"
  Abstract: We study alternating register automata on data words and data trees in relation to logics. A data word (resp. data tree) is a word (resp. tree) whose every position carries a label from a finite alphabet and a data value from an infinite domain. We investigate one-way automata with alternating control over data words or trees, with one register for storing data and comparing them for equality. This is a continuation of the study started by Demri, Lazic and Jurdzinski. From the standpoint of register automata models, this work aims at two objectives: (1) simplifying the existent decidability proofs for the emptiness problem for alternating register automata; and (2) exhibiting decidable extensions for these models. From the logical perspective, we show that (a) in the case of data words, satisfiability of LTL with one register and quantification over data values is decidable; and (b) the satisfiability problem for the so-called forward fragment of XPath on XML documents is decidable, even in the presence of DTDs and even of key constraints. The decidability is obtained through a reduction to the automata model introduced. This fragment contains the child, descendant, next-sibling and following-sibling axes, as well as data equality and inequality tests.

Connected through hyperedge HE-1 (induced by source paper "complexity results on register pushdown automata"):
  with members:
    - "bottom up automata on data trees and vertical xpath"
    - "on the freeze quantifier in constraint ltl decidability and complexity"

Connected through hyperedge HE-2 (induced by source paper "scalar and vectorial mu calculus with atoms"):
  with members:
    - "modal logics for nominal transition systems"
    - "reasoning about data repetitions with counter systems"
    - "smt solving for functional programming over infinite structures"
    - "automata theory in nominal sets"
    - "alternating automata on data trees and xpath satisfiability"
    - "ltl with the freeze quantifier and register automata"
    - "on the freeze quantifier in constraint ltl decidability and complexity"

Connected through hyperedge HE-3 (induced by source paper "synchronizing data words for register automata"):
  with members:
    - "complexity hierarchies beyond elementary"
    - "timed pushdown automata revisited"
    - "ackermannian and primitive recursive bounds with dickson s lemma"
    - "ltl with the freeze quantifier and register automata"
    - "on the freeze quantifier in constraint ltl decidability and complexity"

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 power of priority channel systems"
    - "the parametric ordinal recursive complexity of post embedding problems"
    - "graph logics with rational relations"

Connected through hyperedge HE-5 (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"
    - "the power of priority channel systems"
    - "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-6 (induced by source paper "the power of well structured systems"):
  with members:
    - "complexity hierarchies beyond elementary"
    - "the power of priority channel systems"
    - "graph logics with rational relations"
    - "parameterized verification of asynchronous shared memory systems"
    - "forward analysis for wsts part ii complete wsts"
    - "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"

Connected through hyperedge HE-7 (induced by source paper "model checking parse trees"):
  with members:
    - "an extension of data automata that captures xpath"
    - "tulipa towards a multi formalism parsing environment for grammar engineering"

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.DB(Databases)