Functional convergence of continuous-time random walks with continuous paths
COMMUNICATIONS IN CONTEMPORARY MATHEMATICS(2023)
摘要
Continuous-time random walks (CTRWs) are generic models of anomalous diffusion and fractional dynamics in statistical physics. They are typically defined in the way that their trajectories are discontinuous step functions. In this paper, we propose alternative definition of CTRWs with continuous trajectories. We also give the scaling limit theorem for sequence of such random walks. In general case this result requires the use of strong Skorohod M-1 topology instead of Skorohod J(1) topology, which is usually used in limit theorems for ordinary CTRW processes. We also give additional conditions under which convergence of sequence of considered random walks holds in the J(1) topology.
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关键词
Continuous-time random walk,anomalous diffusion,fractional dynamics,limit theorem,scaling limit,functional convergence,Skorohod topology
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