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arXiv 0912.3904math.PRmath.CO
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边保守优先连接动力学下稠密多重图极限的时间演化

Time evolution of dense multigraph limits under edge-conservative preferential attachment dynamics

Balazs Rath

摘要:

我们定义了边重连模型,一个随时间演化的随机多重图。在每一个时间步,我们改变一个端点的一致选择的边缘:新的端点是选择线性优先连接。我们考虑一个序列的边缘重连接模型,其中初始多重图的序列在某种意义上是收敛的,这是一个自然的推广稠密图序列的收敛性的概念,定义由Lovasz和Szegedy在arXiv:数学/0408173。我们调查如何下的边缘重连动力学的极限对象的演变,如果我们重新调整时间适当:我们给出了完整的表征的时间演化的极限对象从它的初态的稳定状态,这是在配套文件arXiv:1106.2058。在我们的证明中,我们使用可交换阵列,排队和扩散过程的理论。平行边的数量和度在不同的时间尺度上演变,因此模型表现出亚老化。

英文摘要:

We define the edge reconnecting model, a random multigraph evolving in time. At each time step we change one endpoint of a uniformly chosen edge: the new endpoint is chosen by linear preferential attachment. We consider a sequence of edge reconnecting models where the sequence of initial multigraphs is convergent in a sense which is a natural generalization of the notion of convergence of dense graph sequences, defined by Lovasz and Szegedy in arXiv:math/0408173. We investigate how the limit object evolves under the edge reconnecting dynamics if we rescale time properly: we give the complete characterization of the time evolution of the limit object from its initial state up to the stationary state, which is described in the companion paper arXiv:1106.2058. In our proofs we use the theory of exchangeable arrays, queuing and diffusion processes. The number of parallel edges and the degrees evolve on different timescales and because of this the model exhibits subaging.

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