Question

what does this (~) mean in set notations?

Answer 1

not

Answer 2

~A=not A
or elements which are not in A

Answer 3

means the same as ( \(\neg\) )

Answer 4

when used like this " ~A ", is that in relativity to the universal set?

Answer 5

yep

Answer 6

let's say A={1,2,3...}
~A={0 and all negative integers}

right?

Answer 7

Yes :) if A is a subset of Integers

Answer 8

interesting :) thanks!

Answer 9

if the universal set is all numbers then 1/2 is also in ~A

Answer 10

your text is missing...

Answer 11

S=integers
A=(1, 2,3,4 ..)
~A=(...-2, -1, 0)

Answer 12

oh ok, thanks :) that clears things up x
you guys are awesome :)

Answer 13

Glad to help :)