#MathWorld
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tef.bsky.social
i think a bunch about "mindstorms", and semour paper's argument that a computer could be a place for thought, a mathworld under your own control

and now it's welcome to anthropic can i take your order? before picking up yaml in a paper bag
lauraolin.bsky.social laura olin @lauraolin.bsky.social · 8d
Remember "learn to code"? lol
October 28, 2026 at 4:35 PM
edutecheditor.bsky.social
What’s a ghost’s favorite type of math? BOO-lean Algebra! 👻 buff.ly/iIjCKy8 #iTeachMath #MTBoS #MathSky
Boolean Algebra -- from Wolfram MathWorld
A Boolean algebra is a mathematical structure that is similar to a Boolean ring, but that is defined using the meet and join operators instead of the usual addition and multiplication operators.…
mathworld.wolfram.com
October 31, 2026 at 2:04 PM
trunnion.bsky.social
My first 5 TTRPGS:
1. Truncheons & Flagons
2. MathWorld 2e
3. Tenchi Muyo!
4. S.P.E.W. (Retroperistalsis Edition)
5. Twilight of the Crepuscule
October 26, 2026 at 1:15 PM
earanyash.bsky.social
Papert wanted the computer to be a mathworld you shaped yourself. Half of agentic AI now is writing YAML so a model does the shaping for you. Feels like we outsourced the part he actually cared about.
October 28, 2026 at 5:20 PM
colin-fraser.net
Ah I see I am not the first person to make this remark. I feel like this is a remarkably opinionated take for mathworld lol mathworld.wolfram.com/Graph.html
October 21, 2026 at 4:51 PM
touhouyuridoujin.bsky.social
mathworld.wolfram.com/Knot.html
Knot -- from Wolfram MathWorld
A knot is an embedding of a circle in three-dimensional Euclidean space. The usual theory considers tame knots, which can be represented by polygonal knots or closed smooth curves. The unknot is inclu...
mathworld.wolfram.com
October 23, 2026 at 4:41 PM
jean-bastide.bsky.social
Un #fractal est un objet avec #auto-similarité à toutes #échelles. Un tracé de la grandeur sur un #graphique en #log-log par rapport à l'échelle donne alors une ligne droite, dont la #pente est appelée la #dimension_fractale.
#longueur_de_côte #paradoxe_de_côte
mathworld.wolfram.com/Fractal.html
Fractal -- from Wolfram MathWorld
A fractal is an object or quantity that displays self-similarity, in a somewhat technical sense, on all scales. The object need not exhibit exactly the same structure at all scales, but the same "type...
mathworld.wolfram.com
October 23, 2026 at 10:44 PM
his-271828.bsky.social
Wolfram MathWorldの"Diophantine Equation--4th Powers"に
92988^4+185585^4+200711^4=3362·30433^4
がやっと掲載された。
Wolframに情報提供したのは、2026/01/04のことだった。

mathworld.wolfram.com/DiophantineE...

#数学 #不定方程式 #日曜数学者
Diophantine Equation--4th Powers -- from Wolfram MathWorld
A fourth-power Diophantine equation is an equation involving fourth powers whose solutions are sought in integers. As a consequence of Matiyasevich's refutation of Hilbert's 10th problem, it can be pr...
mathworld.wolfram.com
October 22, 2026 at 1:28 AM
ccarrel.bsky.social
I was Sunday years old when I learned that the term for the infinity loop is lemniscate.
Lemniscate -- from Wolfram MathWorld
The lemniscate, also called the lemniscate of Bernoulli, is a polar curve defined as the locus of points such that the product of distances from two fixed points (-a,0) and (a,0) (which can be conside...
mathworld.wolfram.com
October 18, 2026 at 1:42 PM
drnereide.bsky.social
A #SteinerChain is a set of n circles, each tangent to its neighbors and to two given non-intersecting circles. If a closed chain exists, Steiner’s porism guarantees infinitely many.

Their centers lie on an ellipse.

More: mathworld.wolfram.com/SteinerChain...

#Mathsky #iteachmath 🧪 #mathart
Steiner Chain -- from Wolfram MathWorld
Given two circles with one interior to the other, if small tangent circles can be inscribed around the region between the two circles such that the final circle is tangent to the first, the circles fo...
mathworld.wolfram.com
October 17, 2026 at 10:54 AM
hobartmariner.bsky.social
dont report typos on mathworld, eric 'dickhead' w*******n sends a thank you message that, even in acknowledging the error, makes it seem like you were the one needing him to explain it
October 7, 2026 at 6:39 PM
markmcan.bsky.social
It's the Impossible Fork blueprint version, taken from Wolfram MathWorld mathworld.wolfram.com/ImpossibleFo...
Impossible Fork -- from Wolfram MathWorld
The impossible fork (Seckel 2002, p. 151), also known as the devil's pitchfork (Singmaster), blivet, or poiuyt, is a classic impossible figure originally due to Schuster (1964). While each prong of th...
mathworld.wolfram.com
October 7, 2026 at 10:54 AM
bill-n1vux.bsky.social
Online archived open-courseware can be at-your-own-pace, especially if you don't expect transcript-credit.
And skip completely what isn't relevant to your current needs, non linearly.

(&/or wikipedia and Mathworld articles and chase links from there as needed)
October 5, 2026 at 7:36 PM
blackoutprincesses.neocities.org
Kaprekar Routine -- from Wolfram MathWorld
The Kaprekar routine is an algorithm discovered in 1949 by D. R. Kaprekar for 4-digit numbers, but which can be generalized to k-digit numbers. To apply the Kaprekar routine to a number n, arrange the...
mathworld.wolfram.com
September 9, 2026 at 2:56 PM
champierth.bsky.social
So I guess everyone has their favourite polyhedra name, mine's the Great Rhombicosidodecahedron, what's yours?
Great Rhombicosidodecahedron -- from Wolfram MathWorld
The great rhombicosidodecahedron is the 62-faced Archimedean solid with faces 30{4}+20{6}+12{10}. It is also known as the rhombitruncated icosidodecahedron, and is sometimes improperly called the trun...
mathworld.wolfram.com
September 6, 2026 at 8:24 PM
weekend-editor.bsky.social
They'd probably be aperiodic monotiles.

Which... sure, I'd watch that.

mathworld.wolfram.com/AperiodicMon...
Aperiodic Monotile -- from Wolfram MathWorld
An aperiodic monotile, also somewhat humorously known as an einstein (where "einstein" means "one stone", perhaps generalizable to "one tile," in German), is a single tile which tiles the plane only a...
mathworld.wolfram.com
August 22, 2026 at 12:00 AM
edutecheditor.bsky.social
Pierre de Fermat was born in August 17th! His Last Theorem was discovered as marginalia. Learn more on Wolfram MathWorld. buff.ly/vCZ6kNh #MathSky
Fermat's Last Theorem -- from Wolfram MathWorld
Fermat's last theorem is a theorem first proposed by Fermat in the form of a note scribbled in the margin of his copy of the ancient Greek text Arithmetica by Diophantus. The scribbled note was…
mathworld.wolfram.com
August 18, 2026 at 1:00 AM
garbae5000.bsky.social
@wolfieworld.bsky.social saw this and thought of your @
screen shot of graphic logo for the website Wolfram Mathworld
August 15, 2026 at 5:02 PM
alexfreu.de
mathworld.wolfram.com/Narcissistic...
Narcissistic Number -- from Wolfram MathWorld
An n-digit number that is the sum of the nth powers of its digits is called an n-narcissistic number. It is also sometimes known as an Armstrong number, perfect digital invariant (Madachy 1979), or pl...
mathworld.wolfram.com
August 14, 2026 at 2:04 PM
vocabulist.bsky.social
I had to look it up because I haven’t taken a math class in two decades and was immediately reminded of why. mathworld.wolfram.com/CollatzProbl...
Collatz Problem -- from Wolfram MathWorld
A problem posed by L. Collatz in 1937, also called the 3x+1 mapping, 3n+1 problem, Hasse's algorithm, Kakutani's problem, Syracuse algorithm, Syracuse problem, Thwaites conjecture, and Ulam's problem ...
mathworld.wolfram.com
June 23, 2026 at 11:58 AM
celebratememory.bsky.social
mathworld.wolfram.com/SoninesInteg...
Sonine's Integral -- from Wolfram MathWorld
J_m(x)=(2x^(m-n))/(2^(m-n)Gamma(m-n))int_0^1J_n(xt)t^(n+1)(1-t^2)^(m-n-1)dt, where J_m(x) is a Bessel function of the first kind and Gamma(x) is the gamma function.
mathworld.wolfram.com
November 24, 2025 at 6:14 PM
dumpanalysis.bsky.social
I didn't have this mnemonic in Russian, so I had to learn by heart... mathworld.wolfram.com/SOHCAHTOA.html
SOHCAHTOA -- from Wolfram MathWorld
"SOHCAHTOA" is a helpful mnemonic for remembering the definitions of the trigonometric functions sine, cosine, and tangent i.e., sine equals opposite side over hypotenuse, cosine equals adjacent side ...
mathworld.wolfram.com
June 23, 2026 at 3:39 PM
log3overlog2.mathstodon.xyz.ap.brid.gy
@christianp Kepler's answer is this one: https://mathworld.wolfram.com/KeplersMonsters.html
Kepler's Monsters -- from Wolfram MathWorld
In Kepler's 1619 book Harmonice Mundi on tilings, he discussed a tiling built with pentagons, pentagrams, decagons, and "fused decagon pairs." He also called them "monsters." This tiling inspired Penrose tiles in 1973.
mathworld.wolfram.com
November 11, 2025 at 1:12 PM
eev.ee
looks like taking the square root of the radial distance does it mathworld.wolfram.com/DiskPointPic...

a cool way in n dimensions involves normal sampling but that's not readily accessible to js alas
Disk Point Picking -- from Wolfram MathWorld
To generate random points over the unit disk, it is incorrect to use two uniformly distributed variables r in [0,1] and theta in [0,2pi) and then take x = rcostheta (1) y = rsintheta. (2) Because t...
mathworld.wolfram.com
November 25, 2025 at 3:02 PM