Here we are considering a set S whose elements are sets. this symbol denotes the set of all elements that fall in the intersection of the sets contained in S. So any element that is in EVERY set in S will be in the set

this again is talking about a set S whose elements are sets. any element that is in the union of all the sets will be in , that is any element that is in ANY set will be in the setfor any non-empty set S

And

denotes the set

I've never actually seen these represented using Venn Diagrams, but it may be possible. In the class I took we used a kind of number line approachCan it be explain using Venn Daigaram?