Stage 19 · Sets & Intervals — the Language of Functions

19.2.3 Switching Between the Two

19.2 Writing a Set Down: Two Notations

Point 3 of 5

Core idea

Unfold a rule into a list, or compress a list into a rule — both describe the very same circle.

Module goal. Master listing and rule-based notation, switching freely between "naming members one by one" and "stating one rule"

eastmath.com · 19.2 Writing a Set Down: Two Notations · 19.2.3 Switching Between the Two