The DiffPos atom.
The difference between expressions, x−yx - yx−y, where x>y>0x > y > 0x>y>0.
DiffPos(x, y)
x
y
The difference x−yx - yx−y with domain x,y:x>y>0x,y: x > y > 0x,y:x>y>0.
Useful links