Question

Digital logic - What can we say about A-B=A?

Answer 1

B is zero.

Answer 2

Is it that B is an empty set, \[\emptyset\]

Answer 3

It's not empty. B can be 0.

Answer 4

Still kind of confuse so if it's an empty set A can't be equal to itself?

Answer 5

are you talking about sets
A-empty set=A
if A and B have no elements in common
then A-B=A
you can say if A and B are disjoint,
then A-B=A

Answer 6

I think my prof wants me to see how many different ways A can equal itself by making assumptions with B

Answer 7

example:
\[A=\{a,b,c,d,e,f\}\]
\[B=\{1,2,3\}\]
\[\{a,b,c,d,e,f\}-\{1,2,3\}=\{a,b,c,d,e,f\}\]

Answer 8

I got that it can be disjointed and empty but I didn't think of zero I thought zero meant it was empty

Answer 9

{0} and empty set are different

Answer 10

{0} is the set containing the element 0
{ } is the empty set

Answer 11

{} empty set means it is set containing no elements

Answer 12

Oh I see okay thank you!