human: Given a hyperedge-centered hypergraph: <hypergraph>, where the center hyperedge is induced by one source paper and its member nodes are the cited papers.

Details of the hypergraph:
Center hyperedge (induced by source paper "simpler specifications and easier proofs of distributed algorithms using history variables"):
  Abstract: This paper studies specifications and proofs of distributed algorithms when only message history variables are used, using Basic Paxos and Multi-Paxos for distributed consensus as precise case studies. We show that not using and maintaining other state variables yields simpler specifications that are more declarative and easier to understand. It also allows easier proofs to be developed by needing fewer invariants and facilitating proof derivations. Furthermore, the proofs are mechanically checked more efficiently. #R##N#We show that specifications in TLA+ and proofs in TLA+ Proof System (TLAPS) are reduced by 25% and 27%, respectively, for Basic Paxos, and 46% (from about 100 lines to about 50 lines) and 48% (from about 1000 lines to about 500 lines), respectively, for Multi-Paxos. Overall we need 54% fewer manually written invariants and our proofs have 46% fewer obligations. Our proof for Basic Paxos takes 26% less time than Lamport et al.'s for TLAPS to check, and our proofs for Multi-Paxos are checked by TLAPS within 1.5 minutes whereas prior proofs for Multi-Paxos fail to be checked in the new version of TLAPS.

Includes members:
  Member "paxos made epr decidable reasoning about distributed protocols":
    also connected through other hyperedges:
      - Hyperedge HE-1 (induced by source paper "what s live understanding distributed consensus")
  Member "auxiliary variables in tla":
    also connected through other hyperedges:
      (none)
  Member "formal verification of multi paxos for distributed consensus":
    also connected through other hyperedges:
      - Hyperedge HE-2 (induced by source paper "que sera consensus simple asynchronous agreement with private coins and threshold logical clocks")
  Member "demand driven incremental object queries":
    also connected through other hyperedges:
      - Hyperedge HE-3 (induced by source paper "algorithm diversity for resilient systems")
  Member "from clarity to efficiency for distributed algorithms":
    also connected through other hyperedges:
      - Hyperedge HE-4 (induced by source paper "what s live understanding distributed consensus")
  Member "a tla proof system":
    also connected through other hyperedges:
      - Hyperedge HE-5 (induced by source paper "formal verification of multi paxos for distributed consensus")

Question: Please tell me which class the source paper 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.DC(Distributed, Parallel, and Cluster Computing)