# Thread: Joint Distribution

1. ## Joint Distribution

Hi,
I am having trouble understanding the last line of the attached Proof. I do not see why it follows from the proof that they should be taking the reciprocal of the Jacobian.
Can someone please explain why.
Thanks.

2. ## Re: Joint Distribution

Originally Posted by JaguarXJS
Hi,
I am having trouble understanding the last line of the attached Proof. I do not see why it follows from the proof that they should be taking the reciprocal of the Jacobian.
Can someone please explain why.
Thanks.
OK, my question was silly. I see the whole proof now.
Thanks.