A blog of Python-related topics and code.
Recamán's sequence
Posted by: christian in Featured on frontpage on 29 Feb 2020
The Recamán sequence is a famous sequence invented by the Colombian mathematician, Bernardo Recamán Santos. It is defined by the following algorithm, starting at $a_0 = 0$:
The Möbius function and the Mertens conjecture
Posted by: christian on 25 Jan 2020
This blog post was inspired by Holly Krieger's video for Numberphile.
Searching for pi-mnemonic strings in a text
Posted by: christian on 19 Dec 2019
Piphilology comprises the creation and use of mnemonic techniques to remember a span of digits of the mathematical constant $\pi$. One famous technique, attributed to the physicist James Jeans uses the number of letters in each word of the sentence:
Quadtrees #1: Background
Posted by: christian on 15 Nov 2019
The quadtree data structure is a convenient way to store the location of arbitrarily-distributed points in two-dimensional space. Quadtrees are often used in image processing and collision detection.
Processing UK Ordnance Survey terrain data
Posted by: christian in Featured on frontpage on 10 Oct 2019
The UK's Ordnance Survey mapping agency now makes its 50 m resolution elevation data freely-available through its online OpenData download service. This article uses Python, NumPy and Matplotlib to process and visualize these data without using a specialized GIS library.