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Dcpos, Free DCPOs #249

Merged
merged 15 commits into from
Sep 5, 2023
Merged

Dcpos, Free DCPOs #249

merged 15 commits into from
Sep 5, 2023

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TOTBWF
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@TOTBWF TOTBWF commented Aug 10, 2023

Description

This PR defines DCPOs and pointed DCPOs, constructs the free DCPO and the free pointed DPCO, and proves some various properties about them.

@TOTBWF TOTBWF requested a review from plt-amy August 10, 2023 20:08
@plt-amy plt-amy merged commit fea6e6e into main Sep 5, 2023
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@plt-amy plt-amy deleted the dcpos branch September 5, 2023 19:46
Comment on lines +127 to +129
If $(P, \le)$ is a DCPO, then any function $f : P \to Q$ which preserves
directed lubs is automatically a monotone map, and, consequently,
Scott-continuous.
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"consequently, Scott-continuous"? Didn't we just assume $f$ was Scott-continuous?

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Ah I see, you're defining Scott-continuous as monotone + preserves directed lubs.

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Yeah, it's a bit odd, but it makes sense if you view the category of DCPOs as a subcategory of the category of posets.

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3 participants