Conversation started Feb 12, 2019 at 17:21.
Martin Sleziak
Martin Sleziak
Feb 12, 2019 17:21
in Mathematics, 10 mins ago, by N. Maneesh
Is there any simple example(Example that can be easily understand by freshers) for Normal is not a hereditary property?
in Mathematics, 9 mins ago, by N. Maneesh
When I google for it I got Tychonoff plank space. Which is beyond my level :(
in Mathematics, 1 min ago, by Martin Sleziak
@N.Maneesh Did you check examples given on the main site: Examples for subspace of a normal space which is not normal?
14
Q: Examples for subspace of a normal space which is not normal

Jesse P Francis Are there any simple examples of subspaces of a normal space which are not normal? I know closed subspace of a normal space is normal, but open subspace in most cases which I can think of are also normal.

general-topology examples-counterexamples separation-axioms
in Mathematics, 15 secs ago, by Martin Sleziak
And you could also have a look at the examples in pi-base: https://topology.jdabbs.com/theorems/I000036
topology.jdabbs.com/…
Martin Sleziak
Martin Sleziak
Feb 12, 2019 17:56
in Mathematics, 17 mins ago, by Alessandro Codenotti
What's a non normal subspace of $\beta\Bbb N$?
in Mathematics, 10 secs ago, by Martin Sleziak
Stone-Čech Compactification of The integers is $T_5$? Henno Brandsma's answer refers to this paper: https://eudml.org/doc/219965
 
13 hours later…
Martin Sleziak
Martin Sleziak
Feb 13, 2019 06:50
in Mathematics, 5 hours ago, by N. Maneesh
@MartinSleziak Yes. I found that difficult.
Here is another post about the same problem: Give an example of non-normal subspace of a normal space.
 
Conversation ended Feb 13, 2019 at 6:51.