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## Self numbers and self primes

In 1949 the Indian mathematician D.R. Kaprekar discovered a class of numbers called self-numbers. A number N is said to be a self number if it cannot be written as m + the sum of digits of m for any m. To find out if a given number is a self number, the idea is […]

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## 100 000 Pi (π) decimals vs. random numbers

I have previously written a post about how I decided to visualize 100k decimals of Pi, Tau and e with Python. To do that I chose a simple set of three rules that was repeated for each decimal digit; For each of the decimals: First, draw a tiny square and fill it with a color […]

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## Visualizing 100k decimals of Pi, Tau and e with Python

Having an interest for numbers, Linux and small scale programming and scripting shortens the route to test out things like this. It generally starts out with: “I wonder what that would look like” and ends in a continuous awe for numbers, programming and Linux. Having seen similar attempts to visualize numbers and an earlier attempt […]

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## A mathematical poem

When I read this mathematical poem by Leigh Mercer, I knew I had found a treasure: $latex \frac{12 + 144 + 20 + 3 \sqrt{4}}{7} + \left ( 5 \times 11 \right ) = 9^{2} + 0$ A dozen, a gross, and a score Plus three times the square root of four Divided by […]

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## Create plasma-fractal wallpapers for your phone with ImageMagick

Do you like fractals? Do you like plasma? Perhaps both? Or do you simply like to fiddle with linux terminal commands? I know what I like, therefore I give you a one liner to create five awesome wallpapers for your phone: Download the samples here, but if you create them yourself, they will be your […]