Skip to main content
Library homepage
 

Text Color

Text Size

 

Margin Size

 

Font Type

Enable Dyslexic Font
Mathematics LibreTexts

4: Topology of the Real Line

( \newcommand{\kernel}{\mathrm{null}\,}\)

Thumbnail: The blue circle represents the set of points (x, y) satisfying x2+y2=r2. The red disk represents the set of points (x, y) satisfying x2+y2<r2. The red set is an open set, the blue set is its boundary set, and the union of the red and blue sets is a closed set. (Public Domain; Richard Giuly via Wikipedia)


This page titled 4: Topology of the Real Line is shared under a CC BY-NC-SA 1.0 license and was authored, remixed, and/or curated by Dan Sloughter via source content that was edited to the style and standards of the LibreTexts platform.

Support Center

How can we help?