Stage 19 · Sets & Intervals — the Language of Functions

19.1.1 What Is a Set

19.1 From "a Kind of Thing" to a Set

Point 1 of 4

19.1.1 What Is a Set

Core idea

Picture every point inside one circle as a single bunch — that "definite collection of objects" is a set, written A.

Module goal. Build the intuition behind a set — bundling "objects that meet the same standard" into a single whole, and learning to write it down
eastmath.com · 19.1 From "a Kind of Thing" to a Set · 19.1.1 What Is a Set