#birkhoff
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duetosymmetry.com
Found this in Nouvelles recherches sur les systèmes dynamiques, Birkhoff, 1935
February 13, 2026 at 11:49 PM
acidlich.bsky.social
Starting my birthday right reading an algebra book by Saunders MacClane and Garrett Birkhoff
July 11, 2024 at 4:53 PM
medievalmvb.bsky.social
this is wild to me, even the craters have craters

I prefer a ranch-style crater myself

(Artemis II shot of the Moon’s Birkhoff crater courtesy of NASA)
Birkhoff Crater in Low-Light Detail NASA ID: art002e012723 art002e012723 (April 6, 2026) – A close-up view of the Birkhoff crater on the Moon’s far side, captured by the Artemis II crew, shows the surface under low-light conditions. Located within the lunar highlands, Birkhoff is an impact crater shaped by billions of years of collisions. In this underexposed image, reduced brightness reveals subtle variations in texture and topography that are often less visible in brighter views. The lighting emphasizes differences in surface roughness and ejecta patterns, providing a clearer look at the crater’s structure and the surrounding terrain.
April 11, 2026 at 5:48 PM
ipace.bsky.social
The Roman Forum near Palatine Hill features iconic ruins set amongst a modern city.

Palatine and its associations are believed to be one of the origins of the term paladin, a divine knight.

#ttrpg #dnd #writing #writingcommunity #photography
📷: Weston Westmoreland; Marius Birkhoff; & Jebulon
This image is credited to Weston Westmoreland (Reddit u/WestonWestmoreland). This image is credited to Marius Birkhoff (Wikimedia Commons). This image is credited to Jebulon (Wikimedia Commons).
February 14, 2026 at 5:50 PM
ponder.ooo
back in the old days it was enough to just know about the attention mechanism. attention was all anybody needed. now if you wanna have a good llm you have to constrain your residual hyperconnection mappings to a birkhoff polytope and cook up a bespoke hybridized approach to attention compression
July 31, 2026 at 3:21 PM
ponder.ooo
projecting u onto the birkhoff polytope. making u into a convex combination of permutations
January 6, 2026 at 6:31 PM
nasaupdates.bsky.social
4. NASA’s debut images from the lunar flyby are nothing short of breathtaking, offering an ethereal glimpse of the Moon’s surface

4/4
Image Credit: NASA Image Description: (April 6, 2026) – The Artemis II crew captures a portion of the Moon coming into view along the terminator – the boundary between lunar day and night – where low-angle sunlight casts long, dramatic shadows across the surface. This grazing light accentuates the Moon’s rugged topography, revealing craters, ridges, and basin structures in striking detail. Features along the terminator such as Jule Crater, Birkhoff Crater, Stebbins Crater, and surrounding highlands stand out. From this perspective, the interplay of light and shadow highlights the complexity of the lunar surface in ways not visible under full illumination. The image was captured about three hours into the crew’s lunar observation period, as they flew around the far side of the Moon on the sixth day of the mission. Image Description Credit: NASA
April 10, 2026 at 3:41 PM
astroroyalscot.bsky.social
Coo 😍 "Shadows at the Edge of Lunar Day" 🧪🔭

Latest #Artemis images currently dropping here in high res:
images.nasa.gov
The Artemis II crew captures a portion of the Moon coming into view along the terminator – the boundary between lunar day and night – where low-angle sunlight casts long, dramatic shadows across the surface. This grazing light accentuates the Moon’s rugged topography, revealing craters, ridges, and basin structures in striking detail. Features along the terminator such as Jule Crater, Birkhoff Crater, Stebbins Crater, and surrounding highlands stand out. From this perspective, the interplay of light and shadow highlights the complexity of the lunar surface in ways not visible under full illumination. The image was captured about three hours into the crew’s lunar observation period, as they flew around the far side of the Moon on the sixth day of the mission.
April 7, 2026 at 1:31 PM
digthatdata.bsky.social
Birkhoff -- von Neuman logic is the best model of meaning we have.
July 9, 2026 at 2:40 AM
mathsg-bot.bsky.social
Skander Charfi, Ibrahim Trifa: A Multidimensional Birkhoff Theorem for some $C^0$ Lagrangians https://arxiv.org/abs/2609.28373 https://arxiv.org/pdf/2609.28373 https://arxiv.org/html/2609.28373
September 24, 2026 at 6:50 AM
acidlich.bsky.social
MacClane and Birkhoff have never gate kept me
acidlich.bsky.social Liℤℤy Kodpuak née Acid Lich (can’t spell sheaves without she) @acidlich.bsky.social · Jul 22
Last fall I asked the algebra professor about the centralizer and he took massive umbrage to it (I’d been curious since the spring but we were nowhere near talking about it in the fall, and for all I know they never got there.) Anyway feels great to quotient out the professor here and read a book.
July 22, 2024 at 6:34 PM
acidlich.bsky.social
I forgot how much I love algebra by MacClane and birkhoff
July 8, 2025 at 7:50 PM
commandlinevulpine.bsky.social
Belated Happy New Year!

Vixen is working a lot of overtime x.x

#furryartwork by HazakyAracely

Tom © Thomas Blues.
Yuki © Damian Birkhoff
Sam is Mine

Lynx to Artist and FULL below
January 4, 2025 at 12:38 AM
nellynghy.bsky.social
Whether or not you're a fan of thermal operations, there's something fundamentally special about them: by pinning down what it means to equilibrate, thermal operations uniquely emerge! With this, we also uncover nice hierarchy of unital channels, in contrast with the classical Birkhoff theorem.
July 23, 2025 at 3:07 AM
birkhoffartist.bsky.social
Check out my #darksynth #synthwave album if you'd like #promosky

open.spotify.com/album/5gyzi9...
Blood Wave
Birkhoff · Album · 2024 · 9 songs
open.spotify.com
November 24, 2024 at 11:50 PM
mathfa-bot.bsky.social
Jia Du, Tingting Hu, Wenwen Zhang, Qi Liu: A Birkhoff-Orthogonal Dehghan--Rooin Type Constant in Banach Spaces https://arxiv.org/abs/2609.27754 https://arxiv.org/pdf/2609.27754 https://arxiv.org/html/2609.27754
September 24, 2026 at 6:48 AM
acidlich.bsky.social
Looking at algebra by MacClane and Birkhoff and thinking about how much my student would hate me if I started teaching her out of this one
December 12, 2025 at 5:56 AM
gro-tsen.bsky.social
The term seems to date from ~1950, but it is still unclear who coined it (and probably NOT Birkhoff, after all).
April 24, 2026 at 8:45 PM
gro-tsen.bsky.social
Apparently it was Garrett Birkhoff who introduced the mathematical term “clopen” (meaning “both closed and open”, in the context of topology), in or before 1940. Apparently he also introduced the term “poset”. Both wonderful inventions! mathoverflow.net/a/510593/17064
Who coined the term "clopen"?
I was not sure whether this question is appropriate for this forum, but a quick search suggests that there is at least some precedent for asking about the etymology of mathematical terms (for examp...
mathoverflow.net
April 23, 2026 at 9:53 PM
mathco-bot.bsky.social
Xinru Jiang, Guoce Xin, Chen Zhang, Yueming Zhong: Exact Ehrhart Series of Birkhoff Polytopes via Constant Terms and Finite-Field Evaluation https://arxiv.org/abs/2609.25863 https://arxiv.org/pdf/2609.25863 https://arxiv.org/html/2609.25863
September 23, 2026 at 6:47 AM
eu-research.bsky.social
Professor Vadim Kaloshin from @istaresearch.bsky.social and his colleagues in the SPERIG project are tackling the Birkhoff conjecture which could open up new insights into the behaviour of dynamical systems.

issuu.com/euresearcher...

#Research #BirkhoffConjecture #MathematicalBilliards
September 23, 2026 at 7:18 AM
samgoree.bsky.social
While I don't think any of the researchers after Birkhoff shared his goals or worldview, the idea persists through this literature that there is a single information-theoretic, computable, ideal beauty.
December 24, 2024 at 8:21 PM
dirkmassat.bsky.social
Renate Künasts Kanzlei:

- verteidigt syrische Milizionäre (Folter und Mord!)

- ist Hauskanzlei des Abou-Chaker Clans (Hansgeorg Birkhoff)

- verteidigte im Labelle + Mykonos Prozess arabische Terroristen (Künasts Mann Rüdiger Portius)

- verteidigte die KaDeWe-Räuber (Al-Zein-Clan)
September 22, 2026 at 9:17 PM
dirkmassat.bsky.social
Renate Künasts Kanzlei:

- verteidigt syrische Milizionäre (Folter und Mord!)

- ist Hauskanzlei des Abou-Chaker Clans (Hansgeorg Birkhoff)

- verteidigte im Labelle + Mykonos Prozess arabische Terroristen (Künasts Mann Rüdiger Portius)

- verteidigte die KaDeWe-Räuber (Al-Zein-Clan)
September 22, 2026 at 9:17 PM