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added link to M W's answer for clarity, just in case the user's displayname changes, etc.
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edit approved Nov 25, 2023 at 1:43
The Amplitwist
edit approved Nov 25, 2023 at 1:43
The Amplitwist
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This question came to mind upon M W's answer to M W's answer to thisthis recent Math.SE question - the question asked about finite spaces, but it was pointed out that all that was really needed was the Alexandrov property, the class of spaces for which the intersection of an arbitrary collection of open sets is open.

This question came to mind upon M W's answer to this recent Math.SE question - the question asked about finite spaces, but it was pointed out that all that was really needed was the Alexandrov property, the class of spaces for which the intersection of an arbitrary collection of open sets is open.

This question came to mind upon M W's answer to this recent Math.SE question - the question asked about finite spaces, but it was pointed out that all that was really needed was the Alexandrov property, the class of spaces for which the intersection of an arbitrary collection of open sets is open.

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Steven Clontz
Steven Clontz
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This question came to mind upon M W's answer to this recent Math.SE question - the question asked about finite spaces, but it was pointed out that all that was really needed was the Alexandrov property, the class of spaces for which the intersection of an arbitrary collection of open sets is open.