Use that to write out the set P({a}). Then it's clear.
Thanks for your speedy reply. A power set is represented as 2^s, where, s, is the set of all the subsets......
So the power set will be {a} and {}.....a is in the powerset, so I don't see why it's not true? I'm a pretty slow mate, so try to explain it a bit more for me, please.
Thanks for your speedy reply. A power set is represented as 2^s, where, s, is the set of all the subsets......
So the power set will be {a} and {}.....a is in the powerset, so I don't see why it's not true? I'm a pretty slow mate, so try to explain it a bit more for me, please.
No,
I see what you miss understand.
{1,2,3} is a subset of {1,2,3,4}
But, you are sort of saying {a} is a subset of {{},{a}}, which it isn't. It is an element through.