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: "doubles and negatives are positive in self assembly"
  Abstract: In the abstract Tile Assembly Model (aTAM), the phenomenon of cooperation occurs when the attachment of a new tile to a growing assembly requires it to bind to more than one tile already in the assembly. Often referred to as ``temperature-2'' systems, those which employ cooperation are known to be quite powerful (i.e. they are computationally universal and can build an enormous variety of shapes and structures). Conversely, aTAM systems which do not enforce cooperative behavior, a.k.a. ``temperature-1'' systems, are conjectured to be relatively very weak, likely to be unable to perform complex computations or algorithmically direct the process of self-assembly. Nonetheless, a variety of models based on slight modifications to the aTAM have been developed in which temperature-1 systems are in fact capable of Turing universal computation through a restricted notion of cooperation. Despite that power, though, several of those models have previously been proven to be unable to perform or simulate the stronger form of cooperation exhibited by temperature-2 aTAM systems. #R##N#In this paper, we first prove that another model in which temperature-1 systems are computationally universal, namely the restricted glue TAM (rgTAM) in which tiles are allowed to have edges which exhibit repulsive forces, is also unable to simulate the strongly cooperative behavior of the temperature-2 aTAM. We then show that by combining the properties of two such models, the Dupled Tile Assembly Model (DTAM) and the rgTAM into the DrgTAM, we derive a model which is actually more powerful at temperature-1 than the aTAM at temperature-2. Specifically, the DrgTAM, at temperature-1, can simulate any aTAM system of any temperature, and it also contains systems which cannot be simulated by any system in the aTAM.

Connected through hyperedge HE-1 (induced by source paper "the impacts of dimensionality diffusion and directedness on intrinsic universality in the abstract tile assembly model"):
  with members:
    - "self assembly of 3 d structures using 2 d folding tiles"
    - "the non cooperative tile assembly model is not intrinsically universal or capable of bounded turing machine simulation"
    - "universal simulation of directed systems in the abstract tile assembly model requires undirectedness"
    - "the simulation powers and limitations of higher temperature hierarchical self assembly systems"
    - "computing in continuous space with self assembling polygonal tiles"
    - "the power of duples in self assembly it s not so hip to be square"
    - "signal transmission across tile assemblies 3d static tiles simulate active self assembly by 2d signal passing tiles"
    - "intrinsic universality in tile self assembly requires cooperation"

Connected through hyperedge HE-2 (induced by source paper "geometric tiles and powers and limitations of geometric hindrance in self assembly"):
  with members:
    - "the non cooperative tile assembly model is not intrinsically universal or capable of bounded turing machine simulation"
    - "self assembly of shapes at constant scale using repulsive forces"
    - "computing in continuous space with self assembling polygonal tiles"
    - "universal computation with arbitrary polyomino tiles in non cooperative self assembly"
    - "the power of duples in self assembly it s not so hip to be square"
    - "intrinsic universality in tile self assembly requires cooperation"
    - "self assembly with geometric tiles"
    - "negative interactions in irreversible self assembly"

Connected through hyperedge HE-3 (induced by source paper "universal simulation of directed systems in the abstract tile assembly model requires undirectedness"):
  with members:
    - "the simulation powers and limitations of higher temperature hierarchical self assembly systems"
    - "computing in continuous space with self assembling polygonal tiles"
    - "universal computation with arbitrary polyomino tiles in non cooperative self assembly"
    - "the power of duples in self assembly it s not so hip to be square"
    - "the two handed tile assembly model is not intrinsically universal"
    - "signal transmission across tile assemblies 3d static tiles simulate active self assembly by 2d signal passing tiles"
    - "intrinsic universality in tile self assembly requires cooperation"
    - "the tile assembly model is intrinsically universal"

Connected through hyperedge HE-4 (induced by source paper "the simulation powers and limitations of higher temperature hierarchical self assembly systems"):
  with members:
    - "the power of duples in self assembly it s not so hip to be square"
    - "signal transmission across tile assemblies 3d static tiles simulate active self assembly by 2d signal passing tiles"
    - "on the equivalence of cellular automata and the tile assembly model"
    - "intrinsic universality in tile self assembly requires cooperation"
    - "intrinsic universality and the computational power of self assembly"
    - "intrinsic simulations between stochastic cellular automata"
    - "two hands are better than one up to constant factors"
    - "the tile assembly model is intrinsically universal"

Connected through hyperedge HE-5 (induced by source paper "universal computation with arbitrary polyomino tiles in non cooperative self assembly"):
  with members:
    - "the power of duples in self assembly it s not so hip to be square"
    - "the two handed tile assembly model is not intrinsically universal"
    - "intrinsic universality in tile self assembly requires cooperation"
    - "asynchronous signal passing for tile self assembly fuel efficient computation and efficient assembly of shapes"
    - "the tile assembly model is intrinsically universal"
    - "self assembly with geometric tiles"
    - "strong fault tolerance for self assembly with fuzzy temperature"
    - "temperature 1 self assembly deterministic assembly in 3d and probabilistic assembly in 2d"

Connected through hyperedge HE-6 (induced by source paper "intrinsic universality and the computational power of self assembly"):
  with members:
    - "the simulation powers and limitations of higher temperature hierarchical self assembly systems"
    - "it s a tough nanoworld in tile assembly cooperation is not strictly more powerful than competition"
    - "computing in continuous space with self assembling polygonal tiles"
    - "more tight bounds for active self assembly using an insertion primitive"
    - "scaled tree fractals do not strictly self assemble"
    - "universal computation with arbitrary polyomino tiles in non cooperative self assembly"
    - "the power of duples in self assembly it s not so hip to be square"
    - "the two handed tile assembly model is not intrinsically universal"

Connected through hyperedge HE-7 (induced by source paper "the two handed tile assembly model is not intrinsically universal"):
  with members:
    - "intrinsic universality in tile self assembly requires cooperation"
    - "intrinsic universality and the computational power of self assembly"
    - "intrinsic simulations between stochastic cellular automata"
    - "one tile to rule them all simulating any turing machine tile assembly system or tiling system with a single puzzle piece"
    - "two hands are better than one up to constant factors"
    - "parallelism and time in hierarchical self assembly"
    - "the tile assembly model is intrinsically universal"
    - "intrinsic universality in self assembly"

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.ET(Emerging Technologies)