Paul
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Registered User
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May 4 |
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A conjecture on closed discrete subset what is meaning of non-measurable cardinality? |
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May 4 |
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A question on continuous mappings Buzyakova posted a new definition of absolutely submetrizable (= every Tychonoff subtopology is submetrizable) in the paper: On absolutely submetrizable spaces |
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May 4 |
asked | A conjecture on closed discrete subset |
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May 4 |
asked | A question on continuous mappings |
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May 1 |
asked | A question on star $\sigma$-compact spaces |
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Apr 26 |
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Is $f$ continuous? Yes. He may be very old. |
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Apr 26 |
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Is $f$ continuous? The author said unclearly in the paper. |
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Apr 26 |
revised |
Is $f$ continuous? added 33 characters in body; added 8 characters in body; added 12 characters in body; edited body; edited body |
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Apr 26 |
asked | Is $f$ continuous? |
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Apr 3 |
accepted | What is the smallest cardinality a topology can have which is c.c.c but not separable (in ZFC)? |
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Mar 29 |
awarded | ● Teacher |
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Mar 29 |
revised |
What is the smallest cardinality a topology can have which is c.c.c but not separable (in ZFC)? added 9 characters in body; deleted 11 characters in body; added 36 characters in body; deleted 6 characters in body |
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Mar 29 |
answered | What is the smallest cardinality a topology can have which is c.c.c but not separable (in ZFC)? |
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Mar 18 |
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A question on countably compact space @Ali: could you give me a link of the book, so I can download it? |
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Mar 18 |
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A question on countably compact space It may be not at all. |
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Mar 18 |
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A question on countably compact space What is meaning of "5l"? |
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Mar 18 |
revised |
A question on countably compact space added 14 characters in body |
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Mar 17 |
asked | A question on countably compact space |
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Mar 7 |
asked | A question on linearly lindelof space |
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Mar 7 |
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A question from Arhangel’skii-Buzyakova Thanks for the answer. So it is wrong at $x\in Z\setminus H$, where it should be $x\in X\setminus H$. Am I right? |
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Mar 6 |
revised |
A question from Arhangel’skii-Buzyakova added 103 characters in body |
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Mar 6 |
asked | A question from Arhangel’skii-Buzyakova |
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Feb 27 |
awarded | ● Peer Pressure |
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Feb 26 |
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Why $z \in \overline{A}$? @Todd Eisworth: Yes. I got it. Thanks! |
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Feb 26 |
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Why $z \in \overline{A}$? @Todd Eisworth: How could you see that $\cap V_i$ is closed as a closed $G_\omega$-set $P$ of $z$? |
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Feb 26 |
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Why $z \in \overline{A}$? @Yemon Choi: You are not very welcome. It seems that you only can do this, what other could you do? |
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Feb 25 |
revised |
Why $z \in \overline{A}$? added 193 characters in body |
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Feb 25 |
asked | Why $z \in \overline{A}$? |
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Feb 22 |
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A question on metrizable space The mathod very good! |
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Feb 21 |
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A question on metrizable space The maximumm of the caerdinality of closed discrete subspace of $X$. |
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Feb 21 |
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A question on metrizable space It denote the extent of the space $X$. |
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Feb 21 |
revised |
A question on metrizable space added 167 characters in body |
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Feb 21 |
asked | A question on metrizable space |
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Feb 20 |
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How to see such space is Lindelof? @Arthur Fischer: Thanks. I get it. |
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Feb 20 |
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How to see such space is Lindelof? Why could the first note be true? |
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Feb 20 |
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How to see such space is Lindelof? @Martin: Thanks Martin. However it is a little difficult for me. So I posted here for help. |
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Feb 20 |
asked | How to see such space is Lindelof? |
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Feb 19 |
asked | Is the Sorgenfrey Line monotonically monolithic? |
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Feb 9 |
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Does the network of $X$ equal to the network of $C_p(X)$? @Emil Jerabek: Yes. |
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Feb 8 |
asked | Does the network of $X$ equal to the network of $C_p(X)$? |
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Feb 6 |
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An open problem on general topology @Joel David Hamkins: Yes, I mean that less than or equal to. |
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Feb 6 |
revised |
An open problem on general topology added 113 characters in body |
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Feb 6 |
asked | An open problem on general topology |
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Jan 19 |
asked | A question on hereditary Lindelof number |
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Jan 14 |
revised |
Understanding the left-separated spaces added 1 characters in body |
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Jan 14 |
asked | Understanding the left-separated spaces |
