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There is much truth to this post about about #math textbooks.

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  • Here is a “magic trick”

    Uncategorized matheducation math binary
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    Here is a “magic trick”Give kids colored cards.red card- 1 dotblue card- 2 dotsgreen card- 4 dotsyellow card- 8 dots“Show me a total of x dots!”(x is a number between 1 and 15)“look around, why are you all holding up the same cards? isn’t anyone creative enough to find another way?”then ask what goes on the “next card” #matheducation #math #binary
  • I have a #math question.

    Uncategorized math
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    @dnkboston oh because even thoughg'(x) = sin2(x) cos(x) => g(x) = sin3(x)/3is easy, then you'd have to integrate exp(x) sin3(x)/3 which would be … less easy 8-D
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    Sometimes I wander into wonderful rabbit holes.This week's adventure, "What’s the fastest way to multiply two 32-bit numbers on an ARM Cortex-M0 CPU?"If you're thinking Karatsuba multiplication (https://en.wikipedia.org/wiki/Karatsuba_algorithm), you’re wrong.While Karatsuba offers a lower asymptotic complexity (around O(n^1.58)), it only pays off when used recursively on larger integers.On the Cortex-M0, Karatsuba runs much slower than the plain naïve multiply. It turns out, simplicity wins at this scale.Godbolt Source:https://godbolt.org/z/4rP7bnv6r#programming #math
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    Lo and behold, these are very likely gonna be my new sleeve tattoos. A, D & K to left arm, and L, C & B to right arm. With just the left arm alone I can do logs and square roots, with the right arm I can do cube roots, and then combining left and right I can use them as a slide ruler to multiply and divide. #maths #math #mathematics