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Abstract
In order to extend the study of the uniqueness property of multidimensional systems
of stochastic differential equations, we look at the following three-dimensional
system of equations, of which the two-dimensional case has been well studied:
d X t
= Y t d t ,
d Y t
= Z t d t ,
d Z t
=
| X t | α d B t . We prove
that if
( X 0 , Y 0 , Z 0 ) ≠ ( 0 , 0 , 0 )
and
3
4
<
α
< 1 ,
then the system of equations has a unique solution in the strong sense.
Keywords
white noise, stochastic differential equations, uniqueness
Mathematical Subject Classification 2010
Primary: 60H10
Secondary: 34F05
Milestones
Received: 3 October 2019
Revised: 18 February 2020
Accepted: 23 May 2020
Published: 14 July 2020
Communicated by Amarjit Singh Budhiraja