Lmst

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)

A geodesic dome in a back garden framed by two trees and a pathway leading up to it. It's a snowy scene.

@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

u5O is a geodesic sphere with frequency-5 divided faces of an octahedron. Four cyan triangles are surrounded by yellow triangles. Six vertices have four red triangles meeting.

c5C is geodesic sphere with mostly made of hexagons. Six cyan hexagons are surrounded by yellow triangles. Six vertices have a red square.

What happens when you build homes from physics first principles? #homebuilding #sustainableliving #physics_first_principles #bioceramics #geodesic

https://www.youtube.com/watch?v=1gOmHx0_qHc

#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

🇪🇹🇻🇳🇪🇨🇷🇴🇾🇪🇹🇿🇭🇳🇮🇹🇳🇴🇬🇷
🇨🇴🇦🇺🇳🇦
🇧🇷🇪🇬
🇦🇱
🇨🇲🇮🇳🇵🇪🇭🇺🇪🇪🇷🇼

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.

A list of coordinates and their cities/towns alongside their countries. At first glance, it's a random list of cities all across the world, but if you pay attention to the initials, you'll notice not only one, but two simultaneous hidden messages, one for the country and another for the town (Yemen had no city starting with the letter E, so I improvised)

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

A large glass geodesic dome on a green lawn behind a wooden cabin. The woods are visible in the distance.

A glass pyramid inside a giant geodesic dome in a forest.

A wooden gate and a path leading to the dome.

The view from inside the Montreal Biosphere. #photography #montreal #biosphere #architecture #geodesic #urban #EastCoastKin

A tree under a geodesic dome seen from below.

so the north is becoming a bit more nerdy lately so just informing you all

#Oulu #sound #dome #spacialsound #geodesic #sounddome #oamk

https://oamk.fi/oulun-ammattikorkeakoululle-valmistunut-tilallisen-immersiivisen-aanikokemuksen-mahdollistava-sound-dome-jarjestelma/

It is -4c outside. I'm in a poorly-insulated #geodesic dome surrounded by two feet of #snow. I have a propane heater and a warm coat. I have a White Russian I've barely started on. I am listening to the highpoint lowlife podcast (for the first time and it is the absolute shit!). There are colored lights flashing around me. I argue I am doing quite well right now.

(The #dome is about 50 feet from the back door of my warm house so no real survival concerns: my Maslow pyramid is doing great)

(Negativity about the jumbled state of my dome will not be tolerated)

@highpointlowlife.com

#alcohol #chilling #winter #MaybeNotSoBad

A colorful, cluttered scene of the interior of a room-sized geodesic dome. Christmas lights, tools, and unidentifiable miscellany adorn the space. Booted feet in a hammock are all that is visible of the photographer.

Good morning! #sunrise #dawn #ADK #WestportNY #geodesic #barn

geodesic chicken coop in the foreground, barn and trees in the background

Come see us at the East Bay Alt Book & Zine Fest on Saturday, December 7th, 2024 from 12pm - 5pm at the David Brewer Center in Berkeley, CA. Our Trail & Portal table will be located upstairs in the Tamalpais room. Come through!

graphic credit: @jqln

#Geodesic Traveler Cooperative

#IndependentArtists

#IndependentPublishers

#AGRNBM2024 🔦#Geodesic moissonne les sites de bibliothèques numériques pour ajouter les collections, volumes, articles
👀interroge aussi CrossrRef et zbMATH pour enrichir les métadonnées

#AGRNBM2024 #MathDoc nous présente maintenant #Geodesic. Une nouvelle #BibliothèqueNumérique de #Mathematiques

#QuizOfTheDay: A geodesic dome is a hemispherical thin-shell structure (lattice-shell) based on a geodesic polyhedron.

Who invented the #Geodesic #Dome?

A. Walther Bauersfeld
B. Aldo Rossi
C. Frank Lloyd Wright
D. Louis Sullivan

https://knowledgezone.co.in/resources/quiz?qId=5f8ef527e895931b72f37d3b

Here's a math puzzle: I have a two-dimensional sphere, the unit sphere. I want to form a geodesic triangulation such that there are at least N vertices, and the edge length connecting vertex \(i\) with vertex \(j\) is denoted \(\ell_{ij}=|e_{ij}|\) but specifically satisfies \(|\ell_{ij}-\ell|<\varepsilon\) where \(\varepsilon\) is a given tolerance (we can assume \(0<\varepsilon\ll\ell\)).

Puzzle: is there a relation or equation expressing the number of vertices \(N\) with the maximum deviation from equilateral triangles \(\varepsilon\)?

I'm curious about the cases where \(5810\leq N<10^{4}\) and \(\varepsilon\lesssim 10^{-4}\), if this helps any.

#Math #Puzzle #Triangulation #Sphere #Geodesic #Geometry #GeodesicTriangulation #Mathematics

@vees A Buckminster Fuller #geodesic dome!

#Geodesic

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