- #1
setvectorgroup
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Homework Statement
I am confused with sets- just wanted some clarification.
Say, I have a set A={b, {1,a},{3}, {{1,3}}, 3}
What are the elements of set A?
What are the subsets of set A?
Are the subsets also the elements of the set A?
The Attempt at a Solution
I think the elements of the set A are all the objects within it like b, {1,a},{3}, {{1,3}}, 3. Is that right?
The subsets of the set A are the elements(?) {1,a},{3}, {{1,3}}? Here's my confusion: I've seen a textbook show the element(?) {1,a} is a subset of set A like {{1,a}}⊂ A, rather than {1,a} ⊂ A. If that's the right notation, what's the difference between two different ways of parenthesizing?
Thanks.