user avatar
user avatar
user avatar
Nur Alam
  • Member for 1 year, 8 months
  • Last seen this week
1 vote
1 answer
131 views

Does there exist a star-Lindelöf space which is not DCCC?

0 votes
0 answers
42 views

Is the following space $X$ star-$K$-compact?

2 votes
1 answer
112 views

Is $\mathbb R$ with cocountable topology star-$K$-compact?

0 votes
1 answer
120 views

Does there exist a star-Lindelöf space which is not star-$L$-Lindelöf?

1 vote
1 answer
135 views

Is the Isbell–Mrówka space $\Psi(\mathcal A)$ with $\lvert\mathcal A\rvert=\omega_1$ starcompact?

1 vote
1 answer
107 views

Does there exist a starcompact space which is not star-$K$-compact?

1 vote
1 answer
79 views

Does there exist a $\sigma$-compact complete metric space which is not locally compact? [closed]

2 votes
1 answer
147 views

Give an example of a star-Menger space which is not star-$K$-Menger

3 votes
0 answers
75 views

Does there exist a regular $P$-space which is strongly star-Lindelof but not star-Menger?

1 vote
1 answer
70 views

Does there exist a strongly star-Lindelöf space which is not DCCC?

0 votes
1 answer
120 views

Give an example of a Rothberger space $X$ which has a Lindelöf subspace $Y$ that is not Rothberger

7 votes
0 answers
189 views

Does there exist a complete metric space which is Rothberger (or Menger) but not Hurewicz?