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: "new results on the minimum amount of useful space"
  Abstract: We present several new results on minimal space requirements to recognize a nonregular language: (i) realtime nondeterministic Turing machines can recognize a nonregular unary language within weak $\log\log n$ space, (ii) $\log\log n$ is a tight space lower bound for accepting general nonregular languages on weak realtime pushdown automata, (iii) there exist unary nonregular languages accepted by realtime alternating one-counter automata within weak $\log n$ space, (iv) there exist nonregular languages accepted by two-way deterministic pushdown automata within strong $\log\log n$ space, and, (v) there exist unary nonregular languages accepted by two-way one-counter automata using quantum and classical states with middle $\log n$ space and bounded error.

Connected through hyperedge HE-1 (induced by source paper "uncountable classical and quantum complexity classes"):
  with members:
    - "probabilistic verification of all languages"
    - "postselecting probabilistic finite state recognizers and verifiers"
    - "uncountable realtime probabilistic classes"
    - "automata and quantum computing"
    - "magic coins are useful for small space quantum machines"
    - "quantum stochastic and pseudo stochastic languages with few states"
    - "quantum finite automata a modern introduction"
    - "proving the power of postselection"

Connected through hyperedge HE-2 (induced by source paper "classical automata on promise problems"):
  with members:
    - "unary probabilistic and quantum automata on promise problems"
    - "the minimum amount of useful space new results and new directions"
    - "recognizability versus solvability of promise problems in finite classical and quantum automata framework"
    - "potential of quantum finite automata with exact acceptance"
    - "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"
    - "two way finite automata with quantum and classical states"

Connected through hyperedge HE-3 (induced by source paper "alternating private alternating and quantum alternating realtime automata"):
  with members:
    - "the minimum amount of useful space new results and new directions"
    - "finite state verifiers with constant randomness"
    - "classical and quantum realtime alternating automata"
    - "quantum finite automata a modern introduction"
    - "unbounded error quantum computation with small space bounds"
    - "languages recognized by nondeterministic quantum finite automata"

Connected through hyperedge HE-4 (induced by source paper "classical and quantum realtime alternating automata"):
  with members:
    - "automata and quantum computing"
    - "the minimum amount of useful space new results and new directions"
    - "languages recognized by nondeterministic quantum finite automata"

Connected through hyperedge HE-5 (induced by source paper "unary languages recognized by two way one counter automata"):
  with members:
    - "the minimum amount of useful space new results and new directions"
    - "classical and quantum realtime alternating automata"
    - "reachability in two clock timed automata is pspace complete"
    - "equivalence of deterministic one counter automata is nl complete"
    - "log space counter is useful for unary languages by help of a constant size quantum register"
    - "one counter verifiers for decidable languages"
    - "succinctness of two way probabilistic and quantum finite automata"
    - "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.FL(Formal Languages and Automata Theory)