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: "parallelism and time in hierarchical self assembly"
  Abstract: We study the role that parallelism plays in time complexity of Winfree's abstract Tile Assembly Model (aTAM), a model of molecular algorithmic self-assembly. In the "hierarchical" aTAM, two assemblies, both consisting of multiple tiles, are allowed to aggregate together, whereas in the "seeded" aTAM, tiles attach one at a time to a growing assembly. Adleman, Cheng, Goel, and Huang ("Running Time and Program Size for Self-Assembled Squares", STOC 2001) showed how to assemble an n x n square in O(n) time in the seeded aTAM using O(log n / log log n) unique tile types, where both of these parameters are optimal. They asked whether the hierarchical aTAM could allow a tile system to use the ability to form large assemblies in parallel before they attach to break the Omega(n) lower bound for assembly time. We show that there is a tile system with the optimal O(log n / log log n) tile types that assembles an n x n square using O(log^2 n) parallel "stages", which is close to the optimal Omega(log n) stages, forming the final n x n square from four n/2 x n/2 squares, which are themselves recursively formed from n/4 x n/4 squares, etc. However, despite this nearly maximal parallelism, the system requires superlinear time to assemble the square. We extend the definition of *partial order tile systems* studied by Adleman et al. in a natural way to hierarchical assembly and show that no hierarchical partial order tile system can build any shape with diameter N in less than time Omega(N), demonstrating that in this case the hierarchical model affords no speedup whatsoever over the seeded model. We strengthen the Omega(N) time lower bound for deterministic seeded systems of Adleman et al. to nondeterministic seeded systems. Finally, we show that for infinitely many n, a tile system can assemble an n x n' rectangle, with n > n', in time O(n^{4/5} log n), breaking the linear-time lower bound.

Connected through hyperedge HE-1 (induced by source paper "hierarchical growth is necessary and sometimes sufficient to self assemble discrete self similar fractals"):
  with members:
    - "self assembly of 4 sided fractals in the two handed tile assembly model"
    - "hierarchical self assembly of fractals with signal passing tiles extended abstract"
    - "hierarchical self assembly of fractals with signal passing tiles"
    - "scaled tree fractals do not strictly self assemble"
    - "strict self assembly of fractals using multiple hands"
    - "approximate self assembly of the sierpinski triangle"
    - "strict self assembly of discrete sierpinski triangles"
    - "self assembly of the discrete sierpinski carpet and related fractals"

Connected through hyperedge HE-2 (induced by source paper "tilt assembly algorithms for micro factories that build objects with uniform external forces"):
  with members:
    - "coordinated motion planning reconfiguring a swarm of labeled robots with bounded stretch"
    - "collecting a swarm in a grid environment using shared global inputs"
    - "universal coating for programmable matter"
    - "optimal staged self assembly of general shapes"
    - "new geometric algorithms for fully connected staged self assembly"
    - "an algorithmic framework for shape formation problems in self organizing particle systems"
    - "particle computation designing worlds to control robot swarms with only global signals"
    - "crowdsourcing swarm manipulation experiments a massive online user study with large swarms of simple robots"

Connected through hyperedge HE-3 (induced by source paper "optimal staged self assembly of general shapes"):
  with members:
    - "new geometric algorithms for fully connected staged self assembly"
    - "optimal program size complexity for self assembly at temperature 1 in 3d"
    - "the two handed tile assembly model is not intrinsically universal"
    - "staged self assembly and polyomino context free grammars"
    - "producibility in hierarchical self assembly"
    - "intrinsic universality and the computational power of self assembly"
    - "self assembly of arbitrary shapes using rnase enzymes meeting the kolmogorov bound with small scale factor extended abstract"
    - "staged self assembly nanomanufacture of arbitrary shapes with o 1 glues"

Connected through hyperedge HE-4 (induced by source paper "optimal self assembly of finite shapes at temperature 1 in 3d"):
  with members:
    - "optimal program size complexity for self assembly at temperature 1 in 3d"
    - "intrinsic universality in tile self assembly requires cooperation"
    - "two hands are better than one up to constant factors"
    - "the tile assembly model is intrinsically universal"
    - "intrinsic universality in self assembly"
    - "temperature 1 self assembly deterministic assembly in 3d and probabilistic assembly in 2d"
    - "limitations of self assembly at temperature 1"
    - "complexity of self assembled shapes"

Connected through hyperedge HE-5 (induced by source paper "strict self assembly of fractals using multiple hands"):
  with members:
    - "scaled tree fractals do not strictly self assemble"
    - "the two handed tile assembly model is not intrinsically universal"
    - "producibility in hierarchical self assembly"
    - "intrinsic universality in tile self assembly requires cooperation"
    - "fuel efficient computation in passive self assembly"
    - "asynchronous signal passing for tile self assembly fuel efficient computation and efficient assembly of shapes"
    - "two hands are better than one up to constant factors"
    - "self assembly with geometric tiles"

Connected through hyperedge HE-6 (induced by source paper "size separable tile self assembly a tight bound for temperature 1 mismatch free systems"):
  with members:
    - "staged self assembly and polyomino context free grammars"
    - "producibility in hierarchical self assembly"
    - "intrinsic universality in tile self assembly requires cooperation"
    - "the self assembly of paths and squares at temperature 1"
    - "asynchronous signal passing for tile self assembly fuel efficient computation and efficient assembly of shapes"
    - "strong fault tolerance for self assembly with fuzzy temperature"
    - "limitations of self assembly at temperature 1"
    - "staged self assembly nanomanufacture of arbitrary shapes with o 1 glues"

Connected through hyperedge HE-7 (induced by source paper "more tight bounds for active self assembly using an insertion primitive"):
  with members:
    - "parallel computation using active self assembly"
    - "fast algorithmic self assembly of simple shapes using random agitation"
    - "signal transmission across tile assemblies 3d static tiles simulate active self assembly by 2d signal passing tiles"
    - "active self assembly of algorithmic shapes and patterns in polylogarithmic time"
    - "fast arithmetic in algorithmic self assembly"
    - "asynchronous signal passing for tile self assembly fuel efficient computation and efficient assembly of shapes"
    - "the tile assembly model is intrinsically universal"
    - "complexity of self assembled shapes"

Connected through hyperedge HE-8 (induced by source paper "pattern overlap implies runaway growth in hierarchical tile systems"):
  with members:
    - "the two handed tile assembly model is not intrinsically universal"
    - "producibility in hierarchical self assembly"
    - "intrinsic universality in tile self assembly requires cooperation"
    - "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"
    - "strong fault tolerance for self assembly with fuzzy temperature"
    - "limitations of self assembly at temperature 1"

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.CC(Computational Complexity)