
The set {a, b, c} has exactly eight subsets.
 List all the subsets of {a, b, c}.
 Now arrange those subsets in a sequence so that each subset in the
sequence differs from the one before it in one of two ways:
 One new element is inserted:
Example 1: {a}, {a, b}
Example 2: {a, b}, {a, b, c}
 One old element removed
Example 1: {a, b, c}, {a, c}
Example 2: {b}, Ø
 Can you create more than one sequence that fits these criteria?
 Create a listing like this for the subsets of {a, b, c, d}.
 Describe a general method (or explain why there isn’t one) for creating such a
sequence of the subsets of any set {a_{1}, a_{2}, a_{3}, ...a_{n}}.

