Certain positive-definite kernels
Certain positive-definite kernels
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DOI:
10.1090/s0002-9939-1989-1011824-x
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发表时间:
1989
期刊:
影响因子:
--
通讯作者:
E. Waymire
中科院分区:
文献类型:
--
作者:
M. Ossiander;E. Waymire
In one way or another, the extension of the standard Brownian motion process {B T ;T∈[0,∞)} to a (Gaussian) random field {B t :t∈R + d } involves a proof of the positive semi-definiteness of the kernel used to generalize ρ(s,t)=cov(B s ,B t )=s∧t to multidimensional time. Simple direct analytical proofs are provided here for the cases of (i) the Levy multiparameter Brownian motion, (ii) the Chentsov Brownian sheet, and (iii) the multiparameter fractional Brownian field