Local Basis at a Point and First Countable Spaces

[@jiezhengwei5866]

Very clear presentation! Thank you very much, this helps a lot!!!!!

[@DrMcCrady]

Glad it was helpful!

[@darrenpeck156]

Excellent teaching, thank you!

[@adityaprasad465]

Thanks for a great lesson! One point of confusion at 11:00: "There aren't very many real numbers y that are in all of the B_n's simultaneously." Assuming we're still taking y != x, there aren't _any_ such y. I suppose taking "y" out of the sentence may make it easier to follow.

[@DrMcCrady]

Thank you for the comment, I agree I should have said that differently.

[@dqrksun]

That is so clear and understandable, thank you alot🙌

[@DrMcCrady]

Glad it was helpful!

[@HaykTarkhanyan]

Thank you

[@DrMcCrady]

Hope it was helpful!

[@aminkhan5096]

Nice Explanation dear Sir,May I know,Which books do you use to Study Topology or Where do you concretise your concepts from.
Is there any Solution Book on Topology.Kindly Reply

[@DrMcCrady]

Thank you! Most of this is pulled from C Wayne Patty's "Foundations of Topology". No solutions manual for this book (at least I don't know of one).

[@aminkhan5096]

@@DrMcCrady
Is there any Topology Book with Full solution.
Or some Separate Questions and answer book on Topology.
Kindly Suggest sir!

[@DrMcCrady]

I don’t know one with a solutions manual. I’ve heard the Schaum’s Outline series does have some worked problems.

[@suayhossien]

YES!!!!! Thank you

[@DrMcCrady]

Welcome!