An easy way to remember the difference between combination and permutation.
"permutation lock" will be my mnemonic
https://www.mathsisfun.com/combinatorics/combinations-permutations.html
An easy way to remember the difference between combination and permutation.
"permutation lock" will be my mnemonic
https://www.mathsisfun.com/combinatorics/combinations-permutations.html
You don't need a PhD to start writing simple maths proofs in Lean.
This beginner-friendly course gets you started making your first steps.
You don't need a PhD to start writing simple maths proofs in Lean.
This beginner-friendly course gets you started making your first steps.
Can someone please check my maths for me?
My insulin pens hold 300u.
I take 80u per night.
So, each pen lasts 3.75 nights.
I'm gone for 6 weeks, which is 42 nights.
That means I need to take 12 pens.
Is that right?
Can anyone aim me at any learning resource(s) for learning how to properly use a slide rule?
I'm ok with websites, books, whatever. I'd just like to learn how to use one properly, especially since I found my grandfather's which he used for a very long time.
(Boosts / Replies preferred)
Can anyone aim me at any learning resource(s) for learning how to properly use a slide rule?
I'm ok with websites, books, whatever. I'd just like to learn how to use one properly, especially since I found my grandfather's which he used for a very long time.
(Boosts / Replies preferred)
#TIL there are scientific approaches to dice an #onion.
Personally, I was never a fan of cutting vertically and horizontally, which is the way professional chefs usually apply. Especially the horizontal cuts towards ones other hand seem pretty risky to me. That's why I started cutting onions radially. Not as sophisticated as described in the article but I'll definitely try next time.
Dicing an Onion, the Mathematically Optimal Way
https://pudding.cool/2025/08/onions/
#TIL there are scientific approaches to dice an #onion.
Personally, I was never a fan of cutting vertically and horizontally, which is the way professional chefs usually apply. Especially the horizontal cuts towards ones other hand seem pretty risky to me. That's why I started cutting onions radially. Not as sophisticated as described in the article but I'll definitely try next time.
Dicing an Onion, the Mathematically Optimal Way
https://pudding.cool/2025/08/onions/
"A large part of mathematics which became useful developed with absolutely no desire to be useful, and in a situation where nobody could possibly know in what area it would become useful; and there were no general indications that it ever would be so." – John von Neumann (1903–1957)
#quote #mathematics #maths #math
"A large part of mathematics which became useful developed with absolutely no desire to be useful, and in a situation where nobody could possibly know in what area it would become useful; and there were no general indications that it ever would be so." – John von Neumann (1903–1957)
#quote #mathematics #maths #math
Pure #CSS #3D demo on @codepen: polyhedra morphing sequence https://codepen.io/thebabydino/pen/abmNveW
Absolutely no magic numbers, everything computed.
See Pen description for the how behind 😼
#transform #cssTransform #polyhedron #cssTransforms #polyhedra #octahedron #tetrahedron #cube #Maths #geometry #cssVariables #code #coding #frontend #web #dev #webDev #webDevelopment
Pure #CSS #3D demo on @codepen: polyhedra morphing sequence https://codepen.io/thebabydino/pen/abmNveW
Absolutely no magic numbers, everything computed.
See Pen description for the how behind 😼
#transform #cssTransform #polyhedron #cssTransforms #polyhedra #octahedron #tetrahedron #cube #Maths #geometry #cssVariables #code #coding #frontend #web #dev #webDev #webDevelopment
Today I learned that a “Geodreieck” (or “geodriehoek” in Dutch) is only used in some European countries. It’s soooo prevalent here that I never considered it might not be universally used worldwide!
Theorem of the Day (November 29, 2025) : The Diaconis–Holmes–Montgomery Coin Tossing Theorem
Source : Theorem of the Day / Robin Whitty
pdf : https://www.theoremoftheday.org/MathPhysics/Cointossing/TotDCoinTossing.pdf
notes : https://www.theoremoftheday.org/Resources/TheoremNotes.htm#164
Theorem of the Day (November 29, 2025) : The Diaconis–Holmes–Montgomery Coin Tossing Theorem
Source : Theorem of the Day / Robin Whitty
pdf : https://www.theoremoftheday.org/MathPhysics/Cointossing/TotDCoinTossing.pdf
notes : https://www.theoremoftheday.org/Resources/TheoremNotes.htm#164
Some of my wonderful colleagues at the department of #Maths at the University of #Bologna managed to open a call for 2 scholarships (10kE each) reserved to students from #Gaza . Students can apply just after enrolling online to a single exam, which is cost-free and easy to do.
It's a drop in the ocean, which still required some bureaucratic magic by them. We hope to soon follow also from other Departments (including mine)
