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: "a true concurrent model of smart contracts executions"
  Abstract: One of the key features of modern blockchain platforms is the possibility of executing smart contracts, i.e. computer programs that transfer digital assets between users, according to pre-agreed rules. Crucially, the execution of smart contracts must be correct even in the presence of (a minority of) adversaries in the peer-to-peer network that maintains the blockchain. To enforce this property without a trusted authority, the nodes follow a consensus protocol, which determines which node can extend the blockchain at each moment. To this aim, nodes first collect a set of transactions from the network, representing the actions on the smart contracts required by users. Then, to compute the new state of the smart contracts, they put these transactions in sequence (in an arbitrary order), and execute them serially. Once this block of transactions is appended to the blockchain, the other nodes of the network validate it, by re-executing the transactions in the same order. The serial execution of transactions does not take advantage of the multi-core architecture of modern processors, so contributing to limit the throughput of blockchains. In this paper we devise a static analysis technique for parallelizing the execution of transactions, in a formal setting based on Ethereum, the most widespread platform for smart contracts.

Connected through hyperedge HE-1 (induced by source paper "dipetrans a framework for distributed parallel execution of transactions of blocks in blockchain"):
  with members:
    - "achieving greater concurrency in execution of smart contracts using object semantics"
    - "security and privacy on blockchain"
    - "an empirical study of speculative concurrency in ethereum smart contracts"
    - "an efficient framework for optimistic concurrent execution of smart contracts"
    - "chainspace a sharded smart contracts platform"
    - "adding concurrency to smart contracts"
    - "the miner s dilemma"
    - "majority is not enough bitcoin mining is vulnerable"

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.PL(Programming Languages)