Set/Examples
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Examples of Sets
Set of Living People
Let $P$ denote the set of living people.
Then:
| \(\ds \text {The person reading this web page}\) | \(\in\) | \(\ds P\) | ||||||||||||
| \(\ds \text {Julius Caesar}\) | \(\notin\) | \(\ds P\) | ||||||||||||
| \(\ds -4\) | \(\notin\) | \(\ds P\) |
Positive Integers Less than 10
The (strictly) positive integers less than $10$ form a set:
- $\set {1, 2, 3, 4, 5, 6, 7, 8, 9}$
People Called Smith
The collection of people whose surname is Smith form a set.