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: "hierarchy and equivalence of multi letter quantum finite automata"
  Abstract: Multi-letter {\it quantum finite automata} (QFAs) were a new one-way QFA model proposed recently by Belovs, Rosmanis, and Smotrovs (LNCS, Vol. 4588, Springer, Berlin, 2007, pp. 60-71), and they showed that multi-letter QFAs can accept with no error some regular languages ($(a+b)^{*}b$) that are unacceptable by the one-way QFAs. In this paper, we continue to study multi-letter QFAs. We mainly focus on two issues: (1) we show that $(k+1)$-letter QFAs are computationally more powerful than $k$-letter QFAs, that is, $(k+1)$-letter QFAs can accept some regular languages that are unacceptable by any $k$-letter QFA. A comparison with the one-way QFAs is made by some examples; (2) we prove that a $k_{1}$-letter QFA ${\cal A}_1$ and another $k_{2}$-letter QFA ${\cal A}_2$ are equivalent if and only if they are $(n_{1}+n_{2})^{4}+k-1$-equivalent, and the time complexity of determining the equivalence of two multi-letter QFAs using this method is $O(n^{12}+k^{2}n^{4}+kn^{8})$, where $n_{1}$ and $n_{2}$ are the numbers of states of ${\cal A}_{1}$ and ${\cal A}_{2}$, respectively, and $k=\max(k_{1},k_{2})$. Some other issues are addressed for further consideration.

Connected through hyperedge HE-1 (induced by source paper "quantum finite automata survey status and research directions"):
  with members:
    - "unary probabilistic and quantum automata on promise problems"
    - "power of the interactive proof systems with verifiers modeled by semi quantum two way finite automata"
    - "promise problems solved by quantum and classical finite automata"
    - "magic coins are useful for small space quantum machines"
    - "debates with small transparent quantum verifiers"
    - "from quantum query complexity to state complexity"
    - "classical and quantum realtime alternating automata"
    - "quantum finite automata a modern introduction"

Connected through hyperedge HE-2 (induced by source paper "2 tape 1 way quantum finite state automata"):
  with members:
    - "two way finite automata with quantum and classical states"

Connected through hyperedge HE-3 (induced by source paper "automata and quantum computing"):
  with members:
    - "potential of quantum finite automata with exact acceptance"
    - "magic coins are useful for small space quantum machines"
    - "classical automata on promise problems"
    - "finite automata with advice tapes"
    - "superiority of exact quantum automata for promise problems"
    - "probabilistic and quantum finite automata with postselection"
    - "computation with narrow ctcs"
    - "classical and quantum computation with small space bounds phd thesis"

Connected through hyperedge HE-4 (induced by source paper "promise problems solved by quantum and classical finite automata"):
  with members:
    - "on hybrid models of quantum finite automata"
    - "power of the interactive proof systems with verifiers modeled by semi quantum two way finite automata"
    - "potential of quantum finite automata with exact acceptance"
    - "from quantum query complexity to state complexity"
    - "classical automata on promise problems"
    - "on the state complexity of semi quantum finite automata"
    - "superiority of exact quantum automata for promise problems"
    - "succinctness of two way probabilistic and quantum finite automata"

Connected through hyperedge HE-5 (induced by source paper "another approach to the equivalence of measure many one way quantum finite automata and its application"):
  with members:
    - "two way finite automata with quantum and classical states"

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)