A A U. It was developed to describe the collection of objects. Note the commas separates each.
We can use a set function to find out the relationships between sets.
There are no approved revisions of this page so it may not have been reviewed. For other key sets of numbers see key mathematical sets in algebra. All the predefined mathematical symbols from the T e X package are listed below. When talking about sets it is fairly standard to use Capital Letters to represent the set and lowercase letters to represent an element in that set.