Example 0.3.1.

Describe each of the following sets both in words and by listing out enough elements to see the pattern.

  1. \(\{x \st x + 3 \in \N\}\text{.}\)

  2. \(\{x \in \N \st x + 3 \in \N\}\text{.}\)

  3. \(\{x \st x \in \N \vee -x \in \N\}\text{.}\)

  4. \(\{x \st x \in \N \wedge -x \in \N\}\text{.}\)

Solution.
in-context