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The radial part of Brownian motion with respect to mathcal{L}-distance under Ricci flow

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arxiv 1211.3626 v2 pith:D4JZGCSX submitted 2012-11-15 math.PR

The radial part of Brownian motion with respect to mathcal{L}-distance under Ricci flow

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keywords mathcalbrowniandistanceflowmotionricciunderapplication
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Let $\{g_t\}_{t\in [0,T)}$ be a family of complete time-depending Riemannian matrics on a manifold which evolves under backwards Ricci flow. The It\^{o} formula is established for the $\mathcal{L}$-distance of the $g_t$-Brownian motion to a fixed reference point ($\mathcal{L}$-base). Furthermore, as an application, we construct a coupling by parallel displacement which yields a new proof of some results of Topping.

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