Open and Closed Sets

![lesson](lesson-open-closed-01.png) ![diagram](graphic-neighborhood.png) ![lesson](lesson-open-closed-02.png) ![diagram](graphic-limit-point.gif) ![lesson](lesson-open-closed-03.png) ![lesson](lesson-open-closed-04.png) ![diagram](graphic-open-closed-singleton.png) ![lesson](lesson-open-closed-05.png) ![diagram](graphic-open-closed-y=x.png) ![lesson](lesson-open-closed-06.png) ![lesson](lesson-open-closed-07.png) ![diagram](graphic-01-interior.png) [Got Questions? Join Zoom Office Hours](https://patreon.com/typalacademy){ .md-button } [Report a Typo or Error](https://form.jotform.com/TypalAcademy/typo-reporting-form){ .md-button }