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Charles Matthews
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question Question about closed projection

Hi!

I'm wondering if the following can be true: Let Y be a second countable space and $\pi_2:Y \times \mathbb{R}\rightarrow\mathbb{R}$ ($\mathbb{R}$ with its usual topology and $\pi_2$ is the projection onto the second factor) isbe a closed map, does: do these assumptions imply that Y is compact? (thereThere is no assumprionassumption $T_0$, $T_1$ or $T_2$ on $Y$.)

thank you in advance.

question about closed projection

Hi!

I'm wondering if the following can be true: Let Y be a second countable space and $\pi_2:Y \times \mathbb{R}\rightarrow\mathbb{R}$ ($\mathbb{R}$ with its usual topology and $\pi_2$ is the projection onto the second factor) is a closed map, does these assumptions imply that Y is compact? (there is no assumprion $T_0$, $T_1$ or $T_2$ on $Y$)

thank you in advance

Question about closed projection

I'm wondering if the following can be true: Let Y be a second countable space and $\pi_2:Y \times \mathbb{R}\rightarrow\mathbb{R}$ ($\mathbb{R}$ with its usual topology and $\pi_2$ the projection onto the second factor) be a closed map: do these assumptions imply that Y is compact? (There is no assumption $T_0$, $T_1$ or $T_2$ on $Y$.)

thank you in advance.

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Italo
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question about closed projection

Hi!

I'm wondering if the following can be true: Let Y be a second countable space and $\pi_2:Y \times \mathbb{R}\rightarrow\mathbb{R}$ ($\mathbb{R}$ with its usual topology and $\pi_2$ is the projection onto the second factor) is a closed map, does these assumptions imply that Y is compact? (there is no assumprion $T_0$, $T_1$ or $T_2$ on $Y$)

thank you in advance