Tail asymptotics of the Brownian signature
Tail asymptotics of the Brownian signature
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DOI:
--
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发表时间:
2016
影响因子:
1.3
通讯作者:
X. Geng
中科院分区:
文献类型:
--
作者:
H. Boedihardjo;X. Geng
The signature of a path gamma is a sequence whose n-th term is the order-n iterated integrals of gamma. It arises from solving multidimensional linear differential equations driven by gamma. We are interested in relating the path properties of gamma with its signature. If gamma is C^{1}, then an elegant formula of Hambly and Lyons relates the length of gamma to the tail asymptotics of the signature. We show an analogous formula for the multidimensional Brownian motion, with the quadratic variation playing a similar role to the length. In the proof, we study the hyperbolic development of Brownian motion and also obtain a new subadditive estimate for the asymptotic of signature, which may be of independent interest. As a corollary, we strengthen the existing uniqueness results for the signatures of Brownian motion.
DOI:
10.1017/cbo9780511845079
发表时间:
2010
期刊:
影响因子:
--
作者:
Peter K;Victoir;Nicolas B
通讯作者:
Nicolas B
影响因子:
0.5
作者:
Chang J
通讯作者:
Chang J
影响因子:
4.9
作者:
Hambly, Ben;Lyons, Terry
通讯作者:
Lyons, Terry