Explicit Set Definition/Examples/Example 6

Example of Explicit Set Definition
An example of explicit set definition is:
 * $W := \set {a, b, c}$

which can also be written as:
 * $W := \set {b, a, c}$

or:
 * $W := \set {c, b, a}$

or even as:
 * $W := \set {a, a, b, c, a, c, c, b, a}$