Learn how gradient descent really works by building it step by step in Python. No libraries, no shortcuts—just pure math and code made simple.

Need something brilliant to read this weekend? Here is part two of our favourites from 2025 John and James Harris. Photograph: Pal Hansen/The Guardian The year ended with another bout of Beatlemania ...

If you are planning a trip through several cities and want to find the shortest route, you resort to algorithms, a well-defined sequence of deterministic operations. This article accompanies the ...