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: "classical and quantum computation with small space bounds phd thesis"
  Abstract: In this thesis, we introduce a new quantum Turing machine (QTM) model that supports general quantum operators, together with its pushdown, counter, and finite automaton variants, and examine the computational power of classical and quantum machines using small space bounds in many different cases. The main contributions are summarized below. #R##N#Firstly, we consider QTMs in the unbounded error setting: (i) in some cases of sublogarithmic space bounds, the class of languages recognized by QTMs is shown to be strictly larger than that of classical ones; (ii) in constant space bounds, the same result can still be obtained for restricted QTMs; (iii) the complete characterization of the class of languages recognized by realtime constant space nondeterministic QTMs is given. #R##N#Secondly, we consider constant space-bounded QTMs in the bounded error setting: (i) we introduce a new type of quantum and probabilistic finite automata (QFAs and PFAs, respectively,) with a special two-way input head which is not allowed to be stationary or move to the left but has the capability to reset itself to its starting position; (ii) the computational power of this type of quantum machine is shown to be superior to that of the probabilistic machine; (iii) based on these models, two-way PFAs and two-way classical-head QFAs are shown to be more succinct than two-way nondeterministic finite automata and their one-way variants; (iv) we also introduce PFAs and QFAs with postselection with their bounded error language classes, and give many characterizations of them. #R##N#Thirdly, the computational power of realtime QFAs augmented with a write-only memory is investigated by showing many simulation results for different kinds of counter automata. #R##N#Finally, some lower bounds of realtime classical Turing machines in order to recognize a nonregular language are shown to be tight.

Connected through hyperedge HE-1 (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"
    - "unbounded error quantum computation with small space bounds"

Connected through hyperedge HE-2 (induced by source paper "unbounded error quantum computation with small space bounds"):
  with members:
    - "probabilistic and quantum finite automata with postselection"
    - "succinctness of two way probabilistic and quantum finite automata"
    - "language recognition by generalized quantum finite automata with unbounded error abstract poster"
    - "languages recognized by nondeterministic quantum finite automata"
    - "quantum finite automata with one sided unbounded error"
    - "two way finite automata with quantum and classical states"

Connected through hyperedge HE-3 (induced by source paper "superiority of one way and realtime quantum machines and new directions"):
  with members:
    - "quantum counter automata"
    - "quantum computation with write only memory"
    - "probabilistic and quantum finite automata with postselection"
    - "quantum function computation using sublogarithmic space abstract poster"
    - "two way finite automata with quantum and classical states"

Connected through hyperedge HE-4 (induced by source paper "probabilistic and quantum finite automata with postselection"):
  with members:
    - "unbounded error quantum computation with small space bounds"
    - "succinctness of two way probabilistic and quantum finite automata"
    - "languages recognized by nondeterministic quantum finite automata"

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)