From Handwiki
If X is a random variable described by the probability density f(x), and if Y=Y(X) then
File:Hepa img1079.gif
is the probability density of y. For a transformation of several random variables File:Hepa img1080.gif into File:Hepa img1081.gif one has
File:Hepa img1082.gif
where File:Hepa img1083.gif is the Jacobian or Jacobi Determinant of the transformation.
Categories: [W.Krisher and R.Bock] [Data analysis] [Statistics]