- #1
Firepanda
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I need to show that (Wt)2 is a brownian motion
So let Vt = (Wt)2
I need to first show that Vt+s - Vs ~ N(0,t)
Vt+s - Vs = (Wt+s)2 - (Ws)2 = (Wt+s + Ws)(Wt+s - Ws)
(Wt+s - Ws) ~ N(0,t)
But is (Wt+s + Ws) ~ N(0,t)?
If it is what happens when I multiply two RV's that are normally distributed together? What can I say about the variance of the new distribution?
Thanks
So let Vt = (Wt)2
I need to first show that Vt+s - Vs ~ N(0,t)
Vt+s - Vs = (Wt+s)2 - (Ws)2 = (Wt+s + Ws)(Wt+s - Ws)
(Wt+s - Ws) ~ N(0,t)
But is (Wt+s + Ws) ~ N(0,t)?
If it is what happens when I multiply two RV's that are normally distributed together? What can I say about the variance of the new distribution?
Thanks