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 general technique for non blocking trees"
  Abstract: We describe a general technique for obtaining provably correct, non-blocking implementations of a large class of tree data structures where pointers are directed from parents to children. Updates are permitted to modify any contiguous portion of the tree atomically. Our non-blocking algorithms make use of the LLX, SCX and VLX primitives, which are multi-word generalizations of the standard LL, SC and VL primitives and have been implemented from single-word CAS. #R##N#To illustrate our technique, we describe how it can be used in a fairly straightforward way to obtain a non-blocking implementation of a chromatic tree, which is a relaxed variant of a red-black tree. The height of the tree at any time is $O(c+ \log n)$, where $n$ is the number of keys and $c$ is the number of updates in progress. We provide an experimental performance analysis which demonstrates that our Java implementation of a chromatic tree rivals, and often significantly outperforms, other leading concurrent dictionaries.

Connected through hyperedge HE-1 (induced by source paper "dynamic graph operations a consistent non blocking approach"):
  with members:
    - "an efficient framework for optimistic concurrent execution of smart contracts"
    - "efficient lock free binary search trees"
    - "crawling facebook for social network analysis purposes"

Connected through hyperedge HE-2 (induced by source paper "adapting persistent data structures for concurrency and speculation"):
  with members:
    - "distributionally linearizable data structures"
    - "pam parallel augmented maps"
    - "pragmatic primitives for non blocking data structures"
    - "techniques for constructing efficient lock free data structures"
    - "non determinism in byzantine fault tolerant replication"
    - "well structured futures and cache locality"
    - "flat combining and the synchronization parallelism tradeoff"
    - "a critique of ansi sql isolation levels"

Connected through hyperedge HE-3 (induced by source paper "parallel finger search structures"):
  with members:
    - "optimal parallel algorithms in the binary forking model"
    - "optimal multithreaded batch parallel 2 3 trees"
    - "parallel working set search structures"
    - "batch parallel euler tour trees"
    - "parallel combining benefits of explicit synchronization"
    - "fast parallel operations on search trees"
    - "flat combining and the synchronization parallelism tradeoff"

Connected through hyperedge HE-4 (induced by source paper "multiversion concurrency with bounded delay and precise garbage collection"):
  with members:
    - "delay free concurrency on faulty persistent memory"
    - "pam parallel augmented maps"
    - "reclaiming memory for lock free data structures there has to be a better way"
    - "minuet a scalable distributed multiversion b tree"
    - "flat combining and the synchronization parallelism tradeoff"

Connected through hyperedge HE-5 (induced by source paper "efficient single writer concurrency"):
  with members:
    - "multiversion concurrency with bounded delay and precise garbage collection"
    - "delay free concurrency on faulty persistent memory"
    - "pam parallel augmented maps"
    - "reclaiming memory for lock free data structures there has to be a better way"

Connected through hyperedge HE-6 (induced by source paper "pam parallel augmented maps"):
  with members:
    - "range queries in non blocking k ary search trees"
    - "fast parallel operations on search trees"
    - "fast set intersection in memory"

Connected through hyperedge HE-7 (induced by source paper "parallel working set search structures"):
  with members:
    - "fast parallel operations on search trees"
    - "flat combining and the synchronization parallelism tradeoff"

Connected through hyperedge HE-8 (induced by source paper "order out of chaos proving linearizability using local views"):
  with members:
    - "on reducing linearizability to state reachability"

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.DC(Distributed, Parallel, and Cluster Computing)