And, speaking of good news, today we are starting our series -- Combinatorial Synergies People --
where you can learn more about the PEOPLE in our @dfg_public SPP 2458 "Combinatorial Synergies”!
This is happening on #pixelfed ! Please follow and learn about the fantastic mathematicians in our network!
This is incredible. The White House sent out the Deputy Press Secretary Kush Desai to protest that the equation for tariffs on a country was definitely *not* just calculated as just (trade_deficit / imports) but instead calculated as [insert greek letter arithmetic that looks complicated].
What #KushDesai did not realize is that the values chosen for the greek letters in the equation he cited in the paper he cited it from make the formula reduce to…
trade_deficit / imports
"It's essentially #CriticalTradeTheory. Any trade imbalance between two countries is de facto evidence of systemic unfair trade practices."
People ask me what the heck goes on up here.
"I can make a 90° angle with just a string and a flat surface“.
Then they just leave.
PS. You can. (LOL thanks for staying? )
-make a loop.
-bisect twice to get 4 equal segments. 1/2 * 1/2
-trisect one segment 1/3
-move one trisegment length to one side, then other two to the other
-stretch points on flat surface, you now have a 345 unit triangle of arbitrary perimeter length.
1U* 1/(2x2x3) = {StringLength}
StringLength = 12U (arbitrary.)
OR:
-trisect the loop, then bisect twice one trisected length. 1/(3 x 2 x 2)unit.
-move one quartered segment to the left.
from a string and a surface!
I just discovered Rink, a unit-aware calculator for the browser and command line. It's incredible. It can do tons of unit conversions, useful time (zone) math, and a lot more. https://rinkcalc.app/about
My personal cheatsheet: https://evanhahn.com/rink-cheatsheet/
Small #math story for you about my stupid pride and how I humiliated myself.
I tutor high school students twice per week at the local library to help them with their homework. Most are in algebra, but I have one student in prob and stats, and another in trig/pre-calc.
Anyway, I was helping a student with a polar coordinate problem finding the distance of "r" and "theta". It's simple plug-and-play stuff, nothing abstract.
We got chatting about complex numbers, so I derived Euler's formula.
What is Pi Day? Things to know about today's holiday celebrating an iconic mathematical symbol, from @CBSNews.
"People and civilizations have known about pi for thousands of years, with evidence indicating an approximated measurement was used by the ancient Babylonians and ancient Egyptians."
It's Pi Day! 
If you're looking to celebrate the magic of mathematics, check out the @mathematics Community Feed.
Polydron special offer: Use code ATM10 for 10% off your Polydron order (offer ends 30 September 2025)
https://www.polydron.co.uk/shop.html
‘Exploring triangles at the Institute of Mathematics Pedagogy (IMP)’
Tandi Clausen-May reflects on an exploration of 3D shapes made from triangles.
https://atm.org.uk/write/MediaUploads/Journals/MT295/03.pdf
One of the two free articles from Mathematics Teaching 295 for non-members.
#geometry #triangle #helix #polydron #MathematicsTeaching #atm #MT #MT295 #iTeachMath #MathEd #Math #Education #mathematics
Imaginary numbers aren't just mathematical curiosities. They simplify #trigonometry, #calculus, and #geometry, opening up new possibilities in #math and #science. A mathematician explains: https://theconversation.com/taking-a-leap-of-faith-into-imaginary-numbers-opens-new-doors-in-the-real-world-through-complex-analysis-233965
How would you represent the evolution of a (symmetrical) second rank tensor in space?
Specifically a strain tensor that changes in two-dimensions.
(I know how to colour code the different strain tensor components, but would rather have all the information at once)
(exagerating it and doing a 3D model works for the larger changes but less so the subtle ones)
I was commissioned to remake an old painting, Doodle No. 57, for someone to gift to their advisor. It’s always fun revisiting old subjects with new skills. Shading has gotten a lot easier for me since then. Of course, there’s still room for improvement but I think the illusion of depth here is reasonably convincing.
Pigeon Hole Principle
Doodle No. 145
8” square
Watercolor on Arches cotton paper
If there are more pigeons than holes, at least one hole must have more than one pigeon.
#watercolor #art #mathart #math
Why don't we write the logarithm like this? It feels like teaching students what logarithms are is way more painful than teaching roots, but this notation emphasizes that they are perfectly analogous.
I can provide my rough #TexLatex source for this if people are interested.
Maths Mastermind - Day 79
BOOST YOUR BRAIN POWER WITH THIS FUN #MATHEMATICS #PUZZLE !!!
To give him credit, ‘illegal border crossings have plummeted by numbers that nobody has actually ever seen before. It’s much more than 100 percent.’
The US president is truly incredible
https://www.whitehouse.gov/remarks/2025/02/remarks-by-president-trump-before-cabinet-meeting/
