
Self numbers and self primes
In 1949 the Indian mathematician D.R. Kaprekar discovered a class of numbers called selfnumbers. 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 […]

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 […]

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 […]

A mathematical poem
When I read this mathematical poem by Leigh Mercer, I knew I had found a treasure: A dozen, a gross, and a scorePlus three times the square root of fourDivided by sevenPlus five times elevenIs nine squared and not a bit more. Here is another one: A mathematician named BenCould only count modulo ten.He said, […]

Create plasmafractal 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 […]