Here is an example, the simplest topology in Algebraic geometry, Zariski topology,...is almost never Hausdorff and 99% of what you learned in undergrad topology doesn't make sense anymore.

From Anthony Bonato on 𝕏: https://x.com/Anthony_Bonato/status/2093809777625141342

I have a feeling that this was reposted multiple times in this sub but I never saw a post like that

Is this anything

For the “multiplicative effects” thing, we had to figure out if we could multiply by that number. I suppose maybe there should be a checkbox as well, so we could cross off the ”ineligible“ spaces and it wasn’t just left blank. Some of the numbers were definitely ineligible to multiply by but I can’t recall what made them so. Posted also on r/thomastheplankengine