ASYMPTOTIC EXPANSION OF THE DENSITY FOR HYPOELLIPTIC ROUGH DIFFERENTIAL EQUATION
ASYMPTOTIC EXPANSION OF THE DENSITY FOR HYPOELLIPTIC ROUGH DIFFERENTIAL EQUATION
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亚椭圆粗微分方程密度的渐近展开
DOI:
10.1017/nmj.2019.29
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发表时间:
2021
影响因子:
0.8
通讯作者:
NAGANUMA NOBUAKI
中科院分区:
文献类型:
--
作者:
INAHAMA YUZURU;NAGANUMA NOBUAKI
We study a rough differential equation driven by fractional Brownian motion with Hurst parameter . Under Hörmander’s condition on the coefficient vector fields, the solution has a smooth density for each fixed time. Using Watanabe’s distributional Malliavin calculus, we obtain a short time full asymptotic expansion of the density under quite natural assumptions. Our main result can be regarded as a “fractional version” of Ben Arous’ famous work on the off-diagonal asymptotics.
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DOI:
10.1017/cbo9780511845079
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