4 ms·

I'm not sure I'm being dumb but are these all actual lattices (formally speaking) as the division examples don't have (at least not explicitly) a LUB for {4, 6,

• mathgenius 6y ago
  Yes and this is not the only error in the article. I'm not even sure what this is supposed to mean: """ Every operation which preserves a lattice and doesn't use "incomparable" objects is equivalent to addition. """ And the statement at the end: "any lattice is equivalent to another lattice where the relationship is set inclusion." This only holds for distributive lattices. For another take on lattice theory, and ordered structures more generally: https://www.azimuthproject.org/azimuth/show/Applied+Category+Theory+Course#Course https://www.azimuthproject.org/azimuth/show/Applied+Category...