i've been looking at examples and have a thorough idea of the process of transformation of variables using the jacobian method, but still cannot solve this question. after solving the determinant i resulted with a zero, which i am sure is incorrect?
this is the question:
"X and Y have joint pdf fX,Y(x,y)=2 for 0<x<y<1 and fX,Y(x,y)=0 elsewhere. Find the joint pdf for U=Y-X and V=X, (and hence find the marginal pdf for U.)"
my main problem is finding fU,V(u,v). If anyone can show me how to solve this question, id highly appreciate it!! thanks!!! =P