Notes from Thursday 8 January: https://notes.peteashton.com/2026/01/08/notes-from-thursday-january.html

After a foggy day the big storm hit and the garden looked like this at 10pm. (15sec, f7.1, ISO 200)

#geodesic

@narain Still trying to find 300 faces first. Playing with Hedron App @hedron , 53 regular octahedra join to make a shape with 300 faces.

Still trying to make something better...

#mathematics #geometry #polyhedron #geodesic #tiling

@obot50549535
Apparently the compound of ten tetrahedra has 300 edges (when counted as non-intersecting).

Also, some octahedral geodesic polyhedra and Goldberg polyhedra have 300 edges: u5O and c5C at https://en.wikipedia.org/wiki/List_of_geodesic_polyhedra_and_Goldberg_polyhedra#Octahedral

Nice, but still looking for 300 faces (or vertices)...

#askfedi #mathematics #geometry #iTeachMath #polyhedron #geodesic

What happens when you build homes from physics first principles?

YouTube
#ANF2025RNBM Le @FIZKarlsruhe est intéressé par la solution #Geodesic
#ANF2025RNBM On poursuit avec Olivier Labbe qui nous parle de #Geodesic : archivage numérique à #MathDoc

Eden Project, St Austell, Cornwall, 2000
Completed in 2000, this ambitious cluster of geodesic domes enclosed conservatories housing luxuriant plant eco-systems

Photograph: David Goddard/Getty Images

#geodesic
#domes
#photography

Mielenkiintoinen dokumentti kolmiomittauksesta, tai miten suomi kartoitettiin yli 80 vuoden ajan olleen näin maailman tarkin kolmiomittaus. Virhe 1300 km päässä vain ~2 metriä. Uskomatonta. Viimeiset kolmiomittaukset tehtiin vielä 1987. #geodesic #kolmiomittaus

https://youtu.be/cy6PF4V3lA8?si=LkbJIPxyqEWxR1Wt

Kolmiomittaus - Suomen kartoituksen perusta

YouTube
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Why do I spend my time and effort in such things, I'm not sure... Perhaps I'm trying to instigate people (in vain?) into inventing their own ciphering methods, or at least using
#ciphers and/or creative linguistics (coded/densely-symbolic language). It's a form of #rebellion against many things, especially #censorship, even so if such #cipher is unexpected and fairly novel (security through obscurity) and/or you got a vast repertoire of #ciphering #techniques that you randomly choose to use.

Bonus: LLMs have little to no training about specialized things such as
#geographical coordinates (you know, it depends on verbose cartographic data, high-precision convex hull #mathematics (i.e. determining where a point falls inside which polygon representing a given country, and/or #geodesic midpoints) and complicated geopolitics where countries are always disputing fleeting earthly territories between them, ignoring the fact that everything is going to become Pangea again in the future due to unstoppable tectonic activity).

Instead of holding pitchforks against AIs (a behavior that, while understandable, unfortunately will change a total of
zero things) and against people who use it, why not build yourself a method of communication designed to (at least) confuse both the algorithms and their techbro creators? #Math is awesome #knowledge, moreso when applied to the unexpectedness and #randomness.

Praised be Eris, the goddess of randomness.
One of the more unconventional places to visit in Lithuania is the Merkinė Pyramid.

The site is the brainchild of a guy named Povilas Žėkas, who bears an uncanny resemblance to Steve Jobs in a white turtleneck.

Mr Žėkas claims to have received a divine message to build a glass pyramid inside a glass geodesic dome in the middle of the Lithuanian woods. He also claims that people who meditate inside the dome can see into the future.

I was unfortunately unable to confirm the magical clairvoyant properties of the glass structure, but the acoustics are amazing.

#travel #tourism #Lithuania #Lietuva #pyramid #unusual #building #structure #geodesic #GeodesicDome