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- W4385381610 abstract "In Brownian last-passage percolation (BLPP), the Busemann functions $mathcal B^{theta}(mathbf x,mathbf y)$ are indexed by two points $mathbf x,mathbf y in mathbb Z times mathbb R$, and a direction parameter $theta > 0$. We derive the joint distribution of Busemann functions across all directions. The set of directions where the Busemann process is discontinuous, denoted $Theta$, provides detailed information about the uniqueness and coalescence of semi-infinite geodesics. The uncountable set of initial points in BLPP gives rise to new phenomena not seen in discrete models. For example, in every direction $theta > 0$, there exists a countably infinite set of initial points $mathbf x$ such that there exist two $theta$-directed geodesics that split but eventually coalesce. Further, we define the competition interface in BLPP and show that the set of initial points whose competition interface is nontrivial has Hausdorff dimension $frac{1}{2}$. From each of these exceptional points, there exists a random direction $theta in Theta$ for which there exists two $theta$-directed semi-infinite geodesics that split immediately and never meet again. Conversely, when $theta in Theta$, from every initial point $mathbf x in mathbb Z times mathbb R$, there exists two $theta$-directed semi-infinite geodesics that eventually separate. Whenever $theta notin Theta$, all $theta$-directed semi-infinite geodesics coalesce." @default.
- W4385381610 created "2023-07-30" @default.
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- W4385381610 date "2023-07-29" @default.
- W4385381610 modified "2023-09-27" @default.
- W4385381610 title "Global structure of semi-infinite geodesics and competition interfaces in Brownian last-passage percolation" @default.
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- W4385381610 doi "https://doi.org/10.2140/pmp.2023.4.667" @default.
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