Relation as a set of Pairs
Hi,
Can you help in solving this: -
Let X = {1,2,3,4} and R = {(x,y)|x>y}
Write the relation as a set of order pairs. Then find the inverse of relation. Also draw the directed graph of R.Thanks in Advance
just write out all possible pairs where the first element is greater than the second
so the relation is: R = {(4,3), (4,2), (4,1), (3,2), (3,1), (2,1)}
for the inverse relation, just switch the first and second element in each pair of the original relation
i can't help you with the directed graph, never learnt about that (i would think you just plot the points on the xy-plane and connect them with straight lines, but it might not be that intuitive)
Yusnier Viera can help you, visit his videos at Yusnier Viera: Video Gallery and you'll see or you can join to his forum at www.yusnierviera.com'forum.aspx
Good Luck.