Two Simple Proofs for Cramer's Rule
Cramer's rule is usually explained by cofactor expansion of determinant. This note explains two alternative and simple proofs.
Frank the Bunny
Dot Products and Cosines
A simple derivation of the relationship between dot products and cosines. I wrote this reacquaint myself with LaTeX.
Introduction to Python-igraph
In this tutorial, we are going to introduce python-igraph that is packages for network analysis. igraph provides a huge amount of facilities for those who want to do any analysis on networks, from elementary aspects to advanced ones like shortest path, community detection and clustering, network traffic analysis and so forth. In this tutorial, we are going to introduce igraph by a real-life example which is finding a route in Australian road network between two Australian cities with minimum duration.
Notes on quadratic functions for Mathematics Standard Level