L04 · Topology & Continuity

Note

Topology of $\mathbb{R}$ and continuity share one interactive section — still much lighter than the old single mega-page.

Limit point

$x$ is a limit point of $A$ if every neighborhood of $x$ contains a point of $A$ other than $x$ .

Visualization

Open interactive Section 4

Widgets: limit vs isolated points, and Intermediate Value Theorem explorer.