hi
if I have two partition Pi and Pi 'I want to know the decomposition of Pi' by elementsof Pi if possible,
Example:tition
Pi = {{1,3},{2},{4,6},{5}}
Pi' = {{1,2,3},{4,6},{5}}
=> sought to determine q=3
Pi'={{1,3} union {2},{4,6},{5}}
and the nember 2 = Card({1,3} union {2})
haw do this .
thinks
