Hi,
But that's the way !
However, you can note that the Jacobian matrix is just :
Since it's an upper triangular matrix, its determinant is just the product of the terms that are in the diagonal, namely 1.
Show that the following transformation doesn't change volumes.
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My attempt : I believe I must show that the Jacobian of the transformation is worth . I'm having a hard time finding the Jacobian though. I've no clue.
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I know it's wrong, but it's my attempt.