Mathematician @univgroningen
Groningen, The Netherlands
Joined December 2011
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∫∫∫ INTEGRAL DAY ∫∫∫
The integral symbol is 350 years old! On October 29th, 1675 Leibniz has written down the first ever integral sign (see the image).
Celebrate integral day by sharing your favourite integral or integral related fact / content.
Interactive Calculus
You can access the full course for free using the link below
youtube.com/playlist?list=PL…
Big Bang Gears
With the fastest gear turning once every 1.5 seconds and a gear ratio of 4:1 the last gear completes a full turn once every (you guessed it) 13.7 billion years!!
The outer teeth on the last gear move by a proton's diameter every 25 minutes...
...I've built this for my students, it's a simple yet powerful demonstration of the power of geometric progression / exponential growth and our utter lack of intuition thereof...