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: "questions related to bitcoin and other informational money"
  Abstract: A collection of questions about Bitcoin and its hypothetical relatives Bitguilder and Bitpenny is formulated. These questions concern technical issues about protocols, security issues, issues about the formalizations of informational monies in various contexts, and issues about forms of use and misuse. Some questions are formulated in the more general setting of informational monies and near-monies. We also formulate questions about legal, psychological, and ethical aspects of informational money. Finally we formulate a number of questions concerning the economical merits of and outlooks for Bitcoin.

Connected through hyperedge HE-1 (induced by source paper "architectural adequacy and evolutionary adequacy as characteristics of a candidate informational money"):
  with members:
    - "bitcoin a money like informational commodity"
    - "bitcoin and beyond exclusively informational money"

Connected through hyperedge HE-2 (induced by source paper "modeling and verification of the bitcoin protocol"):
  with members:
    - "modeling bitcoin contracts by timed automata"

Connected through hyperedge HE-3 (induced by source paper "bitcoin a money like informational commodity"):
  with members:
    - "the false premises and promises of bitcoin"
    - "the unreasonable fundamental incertitudes behind bitcoin mining"
    - "bitcoin and beyond exclusively informational money"
    - "instruction sequence processing operators"
    - "information carriers and identification of information objects an ontological approach"
    - "on the expressiveness of single pass instruction sequences"
    - "informaticology combining computer science data science and fiction science"
    - "ologs a categorical framework for knowledge representation"

Connected through hyperedge HE-4 (induced by source paper "promises impositions and other directionals"):
  with members:
    - "decision taking versus promise issuing"
    - "bitcoin and beyond exclusively informational money"
    - "a static theory of promises"

Connected through hyperedge HE-5 (induced by source paper "decision taking versus promise issuing"):
  with members:
    - "bitcoin and beyond exclusively informational money"
    - "decision taking versus action determination"
    - "decision taking for selling thread startup"
    - "instruction sequence processing operators"
    - "informaticology combining computer science data science and fiction science"
    - "decision taking as a service"
    - "about instruction sequence testing"
    - "four conceptions of instruction sequence faults"

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.CY(Computers and Society)