What I saw on the web on 2022.7.25

[reblogarythm]

1. Alternative irrationality proofs
   by Flying Colours Maths
   https://www.flyingcoloursmaths.co.uk/alternative-irrationality-proofs/
   some fun ones in here, although they're mostly based on infinite descent
   via rss
   
   
2. an image that goes with the topic of the previous link
   by David Radcliffe
   https://twitter.com/daveinstpaul/status/1395784491117907973
   also infinite descent. also great.
   via previous link
   
   
3. the Hesje Observatory
   by the University of Alberta, Augustana Campus
   https://www.ualberta.ca/augustana/research/centres/amlrs/observatory/index.html
   might be worth a visit sometime!
   via someone else talking about it on DW