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(This is based on my earlier questionmy earlier question, but I think this one would be easier to answer.)


Let $\langle X,\mathbf{\delta} \hspace{.01 in} \rangle$ be a separated proximity space, and let $\cal{T}\hspace{.04 in}$ be the induced topology on $X$.
Then, ZF proves that $\langle X,\cal{T}\hspace{.06 in} \rangle$ is regular Hausdorff, and
ZF + (Dependent Choice) $\;$proves that $\langle X,\cal{T}\hspace{.06 in} \rangle$ is completely regular.

Does ZF prove that $\langle X,\cal{T}\hspace{.06 in} \rangle$ is completely regular?

(This is based on my earlier question, but I think this one would be easier to answer.)


Let $\langle X,\mathbf{\delta} \hspace{.01 in} \rangle$ be a separated proximity space, and let $\cal{T}\hspace{.04 in}$ be the induced topology on $X$.
Then, ZF proves that $\langle X,\cal{T}\hspace{.06 in} \rangle$ is regular Hausdorff, and
ZF + (Dependent Choice) $\;$proves that $\langle X,\cal{T}\hspace{.06 in} \rangle$ is completely regular.

Does ZF prove that $\langle X,\cal{T}\hspace{.06 in} \rangle$ is completely regular?

(This is based on my earlier question, but I think this one would be easier to answer.)


Let $\langle X,\mathbf{\delta} \hspace{.01 in} \rangle$ be a separated proximity space, and let $\cal{T}\hspace{.04 in}$ be the induced topology on $X$.
Then, ZF proves that $\langle X,\cal{T}\hspace{.06 in} \rangle$ is regular Hausdorff, and
ZF + (Dependent Choice) $\;$proves that $\langle X,\cal{T}\hspace{.06 in} \rangle$ is completely regular.

Does ZF prove that $\langle X,\cal{T}\hspace{.06 in} \rangle$ is completely regular?

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François G. Dorais
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user5810
user5810

Does ZF prove that proximity spaces are completely regular?

(This is based on my earlier question, but I think this one would be easier to answer.)


Let $\langle X,\mathbf{\delta} \hspace{.01 in} \rangle$ be a separated proximity space, and let $\cal{T}\hspace{.04 in}$ be the induced topology on $X$.
Then, ZF proves that $\langle X,\cal{T}\hspace{.06 in} \rangle$ is regular Hausdorff, and
ZF + (Dependent Choice) $\;$proves that $\langle X,\cal{T}\hspace{.06 in} \rangle$ is completely regular.

Does ZF prove that $\langle X,\cal{T}\hspace{.06 in} \rangle$ is completely regular?