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- Among every set of six points in 3-space (in general position) are two linked triangles: The Conway-Gordon-Sachs theorem. General position excludes three points collinear and four points coplanar. #MathSky #Geometry
- Giuliano Gagliardi (Hannover and MPI Bonn) speaking on "The Manin-Peyre conjecture for smooth spherical Fano varieties of semisimple rank one" at our #AlgebraicGeometry #Math seminar back in June 2020. #MathSky
- Recognize the outstanding contributions of your peers by nominating them for AMS and Joint Prizes and Awards. Your nominations help ensure that we honor the individuals and institutions whose work is advancing mathematics in meaningful ways. #MathSky
- Start your day with this #yohaku. Fill in cells with 9 different factors of 520 to get totals shown in each row/column. #mathsky #iTeachMath
- Question for 7th May, 2025 from the @dailyepsilon.bsky.social calendar #Math #MathSky #MathToday #Mathematics
- If we put all 33 Premier League winners in a table and sort them by the number of the times they’ve won the league, in the right-hand column there is a Fibonacci sequence. #MathSky
- From teach.reflect.repeat on IG: “My favourite thing to do before introducing a concept is asking students open-ended questions! Why? 🧠 It helps shows what they they already know 🗣️they have to explain their thinking 💛 they learn to understand each others perspective” #MathSky #ITeachMath
- Congratulations to the 25 successful applicants for Round 1 of SMRI's 2025 International Visitor Program 🪇🎉Stay tuned for Round 2, opening in June for visits from mid 2026 #mathsky mathematical-research-institute.sydney.edu.au/news/interna...
- Saturn's North pole hexagon. Still not thoroughly understood. Multiple Earths could fit inside. en.wikipedia.org/wiki/Saturn%... #MathSky #Geometry #Astronomy #Planets
- So I've been reading up on the Mathematicians of #ancientgreece. Coming to the end of the Hellenistic golden age, and I come across this gem. Turns out #Pythagoras theorem is just the weaker version of Papus' Area Theorem. And yes he will get his own episode on #themathematicianspodcast. #mathsky
- more thanks... @divbyzero.bsky.social @kurt-salisbury.bsky.social @3blue1brown.com @xaqwg.bsky.social @debatemath.bsky.social James Tanton @quantamagazine.bsky.social Ben Orlin @pwharris.bsky.social Check out the post! #MathsToday #iTeachMath #MathSky karendcampe.wordpress.com/2025/05/05/c...
- Today precalc ss got to explore and #MathPlay 🧮 with infinite geometric series via @geogebra.org classroom. Ss also enjoyed a “Divergent” #MathMeme at the end of class 😁 #ITeachMath #MTBoS #MathSky #MathsToday #EduSky #STEM #Math #EdTech
- ❓for math friends: How long do you spend studying maths each week on average? This includes reading theory, discussing/working problems, & reviewing material. 😵💫 Doing some independent studies and it can be hard to gauge "where one is at." 🤔 LMK in comments -- thanks! 🤗 #mathsky 🧪 #academicsky
- Jesús Martinez Garcia (Essex) speaking on "The moduli continuity method for log Fano pairs" at our #AlgebraicGeometry #Math seminar back in May 2020. #MathSky
- Wow! She lived till 104. #MathSky
- A quick wrap-up of my short reading course on #combinatorics, and some (very) simple number theoretic applications. I was expecting this course to be more painful than it was! #MathSky ergodicbees.wordpress.com/2025/04/30/c...
- Happy Easter from the Stanford Bunny! (en.wikipedia.org/wiki/Stanfor...) Developed by Stanford researchers in 1994 as a test bed model for computer graphics algorithms. This version: 2,503 vertices. #MathSky #Geometry #Graphics
- A cube can be reoriented so that it can pass through a hole carved in a congreunt cube: Prince Rupert's cube (1693!) "It is unknown whether this is true for all convex polyhedra"! (en.wikipedia.org/wiki/Prince_...) #MathSky #Geometry
- Correcting an earlier post (thanks Sophie Huiberts) to show off this attractive image. It shows the shortest paths from the white dot to each of 260 points on the genus-6 surface: 56 vertices, and regularly spaced points on edges. With student Biliana Kaneva. #MathSky #Geometry
- The minimum rope length for a trefoil is known to be somewhere between 15.66 and 16.37. It would need to be 12 for that one-foot, one-inch question to have a positive answer. The exact rope length is not known for any non-trivial knot. #MathSky
- This open question was resolved ~20 yrs ago: Can one tie a knot with one foot of one-inch diameter rope? The answer is No: Diao, Yuanan. "The lower bounds of the lengths of thick knots." *Journal of Knot Theory and Its Ramifications* 12, no. 01 (2003): 1-16. #MathSky #Geometry #Topology
- Wrapping up my reading course on graph theory with a post about matchings and Hall's theorem. #MathSky ergodicbees.wordpress.com/2025/03/30/m...
- There are three simple closed geodesics on a cube. Two are planar: an equatorial band and the hexagon slice. The 3rd is a bit more unusual. It angles off the front bottom edge at arctan(2) = ~63 deg, forming a nonplanar hexagon of length 2 sqrt{5}. #MathSky #Geometry
- Interesting article; now if only math could explain why people stand on the left on DC Metro escalators. #MathSky news.mit.edu/2025/mathema...
- A Collatz-like function f(n) that bifurcates on the primes, I posed a decade ago. It remains unknown if it always falls into a 2/4 cycle. For n=229, f(n) shoots off to 10^{376} before returning to that cycle after 6309 iterations. mathoverflow.net/questions/20... #MathSky
- Unfoldings of the hypercube. There are 261 unfoldings of the 4D hypercube into 3D. It is known since 2021 that none self-overlap (doi.org/10.37236/9796) and each tiles 3-space (Moritz Firsching). The most famous is the Dali cross, immortalized in his painting *Corpus Hypercubus*. #MathSky #Geometry
- The attractively intricate optimal tiling of an equilateral triangle by the trapezoid polyiamond (pentiamond), found in 2019 by an anonymous user ('theonetruepath') on MathOverflow. #MathSky #Geometry
- Back at it after Christmas and the summer holidays. Graph theory is a totally new subject for me, so I decided to write down a few thoughts ergodicbees.wordpress.com/2025/03/02/t... #MathSky
- Today would have been the 104th birthday of Brazilian mathematician Marília Chaves Peixoto, the 1st woman in Brazil to earn a PhD in math, and a researcher into the conditions for stable fluid flow over a surface. She passed away in 1961 at the age of just 39. #WomeninSTEM #MathSky #HistSci 🧪🧮
