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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
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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
  • Non si fanno prigionieri 😀

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    @G3rt veramente pazzesco!
  • M(77232917) is officially the 50th Mersenne Prime

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    M(77232917) is officially the 50th Mersenne Prime.M(77232917) was discovered seven and half years ago. Now, thanks to the diligent efforts of many GIMPS volunteers, every smaller Mersenne number has been successfully double-checked. Thus, M(77232917) officially becomes the 50th Mersenne prime.This is a significant milestone for the GIMPS project. The next Mersenne milestone is not far away, please consider joining this important double-checking effort.https://www.mersenne.org/report_exponent/?exp_lo=77232917&full=1#math #maths