What I saw on the web on 2022.3.20

[reblogarythm]

1. Whitehead's point-free geometry
   by Whitehead (duh!), but this write-up is from wikipedia
   https://en.wikipedia.org/wiki/Whitehead%27s_point-free_geometry
   if there can be pointless topology, why not point-free geometry? the formalizations seem reasonable to me
   via irregular webcomic
   
   
2. Captures at the right time and place
   by Captures at the right time and place
   https://twitter.com/capturmoment
   lots of clever trompes l'œil here
   via Ada_Palmer