A Set is Closed if and only if its Complement is Open || Metric Spaces

[@thomassabqc9399]

Very well explained and easy to follow, it is a good review for my second real analysis course I am taking this semester. Thank you :)

[@TheMathSorcerer]

😀😀

[@PatrickBateman969]

Hello Sorcerer why not make a video on all the graduate books from start to finish?😇 Please Sir I am a fan yours!

[@TheMathSorcerer]

😀😀

[@Bedoroski]

Great video

[@nmionline9003]

Metric spaces are in the next level real analysis class. We are doing proofs with opened or closed sets. Is it possible to do a proof for a first semester class? Think of it as the complement of this video. :D

[@YuriGlazov-k8s]

does the empty set provide a counterexample?