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: "atomic commitment across blockchains"
  Abstract: The recent adoption of blockchain technologies and open permissionless networks suggest the importance of peer-to-peer atomic cross-chain transaction protocols. Users should be able to atomically exchange tokens and assets without depending on centralized intermediaries such as exchanges. Recent peer-to-peer atomic cross-chain swap protocols use hashlocks and timelocks to ensure that participants comply to the protocol. However, an expired timelock could lead to a violation of the all-or-nothing atomicity property. An honest participant who fails to execute a smart contract on time due to a crash failure or network delays at her site might end up losing her assets. Although a crashed participant is the only participant who ends up worse off, current proposals are unsuitable for atomic cross-chain transactions in asynchronous environments where crash failures and network delays are the norm. In this paper, we present AC3WN, the first decentralized all-or-nothing atomic cross-chain commitment protocol. Events for redeeming and refunding smart contracts to exchange assets are modeled as conflicting events. An open permissionless network of witnesses is used to guarantee that conflicting events could never simultaneously occur and either all smart contracts in an atomic cross-chain transaction are redeemed or all of them are refunded.

Connected through hyperedge HE-1 (induced by source paper "distributed cross blockchain transactions"):
  with members:
    - "distributed nonblocking commit protocols for many party cross blockchain transactions"
    - "cross chain deals and adversarial commerce"
    - "towards scaling blockchain systems via sharding"
    - "atomic cross chain swaps"

Connected through hyperedge HE-2 (induced by source paper "distributed nonblocking commit protocols for many party cross blockchain transactions"):
  with members:
    - "cross chain deals and adversarial commerce"
    - "towards scaling blockchain systems via sharding"
    - "atomic cross chain swaps"

Connected through hyperedge HE-3 (induced by source paper "blockchains and distributed databases a twin study"):
  with members:
    - "cross chain deals and adversarial commerce"
    - "blockchain meets database design and implementation of a blockchain relational database"
    - "chain of trust can trusted hardware help scaling blockchains"
    - "blockchain technology overview"
    - "performance evaluation of the quorum blockchain platform"
    - "hyperledger fabric a distributed operating system for permissioned blockchains"
    - "towards scaling blockchain systems via sharding"
    - "atomic cross chain swaps"

Connected through hyperedge HE-4 (induced by source paper "towards global asset management in blockchain systems"):
  with members:
    - "parblockchain leveraging transaction parallelism in permissioned blockchain systems"
    - "hyperledger fabric a distributed operating system for permissioned blockchains"
    - "atomic cross chain swaps"
    - "sidechains decoupled consensus between chains"
    - "blockchains consensus protocols in the wild"
    - "sprites and state channels payment networks that go faster than lightning"
    - "adding concurrency to smart contracts"
    - "strong federations an interoperable blockchain solution to centralized third party risks"

Connected through hyperedge HE-5 (induced by source paper "transactional smart contracts in blockchain systems"):
  with members:
    - "cross chain deals and adversarial commerce"
    - "towards global asset management in blockchain systems"
    - "exploiting the laws of order in smart contracts"
    - "atomic cross chain swaps"
    - "a concurrent perspective on smart contracts"
    - "adding concurrency to smart contracts"

Connected through hyperedge HE-6 (induced by source paper "cross chain deals and adversarial commerce"):
  with members:
    - "hyperledger fabric a distributed operating system for permissioned blockchains"
    - "atomic cross chain swaps"
    - "chainspace a sharded smart contracts platform"
    - "decentralizing authorities into scalable strongest link cothorities"
    - "augur a decentralized open source platform for prediction markets"

Connected through hyperedge HE-7 (induced by source paper "platypus a partially synchronous offchain protocol for blockchains"):
  with members:
    - "cross chain deals and adversarial commerce"
    - "brick asynchronous state channels"
    - "evaluating the red belly blockchain"
    - "atomic cross chain swaps"

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.DB(Databases)