User Nur Alam

1 vote

1 answer

266 views

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

asked Dec 24, 2021 at 11:45

3 votes

1 answer

252 views

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

asked Oct 12, 2021 at 6:07

6 votes

1 answer

251 views

A ZFC example of a Menger space which is not Scheepers

asked Mar 18, 2023 at 14:43

7 votes

0 answers

231 views

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

asked Sep 9, 2020 at 17:36

0 votes

2 answers

192 views

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

asked Mar 27, 2021 at 16:17

0 votes

1 answer

167 views

What does mean by "$\omega +1$ is convergent sequence"? [closed]

asked Aug 15, 2022 at 18:54

2 votes

1 answer

155 views

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

asked Feb 5, 2022 at 20:43

3 votes

1 answer

154 views

Is there any class of ideals for which $\mathfrak{b}(\mathcal I)\neq\mathfrak{b}$?

asked Aug 9, 2023 at 12:28

0 votes

1 answer

153 views

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

asked Jan 29, 2022 at 18:36

1 vote

1 answer

152 views

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

asked Jan 25, 2022 at 20:38

1 vote

1 answer

148 views

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

asked Mar 6, 2022 at 20:02

3 votes

1 answer

127 views

Characterization of the Scheepers property by Scheepers game

asked Feb 10, 2023 at 19:30

1 vote

1 answer

112 views

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

asked Jan 25, 2022 at 11:54

1 vote

0 answers

83 views

Terminology for the property: "Each uncountable disjoint open family is locally countable"

asked Jun 28, 2022 at 9:18

3 votes

0 answers

82 views

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

asked Sep 25, 2021 at 13:18

1 vote

1 answer

80 views

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

asked Sep 1, 2021 at 19:15

1 vote

0 answers

68 views

A ZFC example of a star-$K$-Menger space which is not star-$K$-Hurewicz

asked Mar 19, 2023 at 11:35

Stack Exchange Network

17 Questions

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

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

A ZFC example of a Menger space which is not Scheepers

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

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

What does mean by "$\omega +1$ is convergent sequence"? [closed]

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

Is there any class of ideals for which $\mathfrak{b}(\mathcal I)\neq\mathfrak{b}$?

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

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

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

Characterization of the Scheepers property by Scheepers game

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

Terminology for the property: "Each uncountable disjoint open family is locally countable"

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

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

A ZFC example of a star-$K$-Menger space which is not star-$K$-Hurewicz