How many sets are there?
There is the set of head covers (hats), the set of trees, the set of even
numbers, and the set of polyhedral. But there is also a set of round objects
and a set of pointy objects. There are 6 well-defined sets.
There is the set of head covers (hats), the set of trees, the set of even
numbers, and the set of polyhedral. But there is also a set of round objects
and a set of pointy objects. There are 6 well-defined sets.
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A set is a collection of objects. The objects are called the elements of the set. ... For example, the set of real numbers, the set of even integers, the set of all books written before the year 2000. If two sets A and B have the same elements, we say that they are equal, and write A = B