sigh.github.io


Interactive Sudoku Solver

A fast interactive Sudoku solver written in Javascript. Handles many Sudoku variants including Killer Sudoku and Jigsaw Sudoku.

Stern-Brocot Tree

An infinitly* zoomable Stern-Brocot Tree. This structure contains all positive rational numbers in their lowest form, and in order.

Enumerating the Rationals with Stern-Brocot Trees

An article showing how to define a simple, efficient enumeration of the rational numbers.

Reed-Solomon Error Correction

An interactive demo of Reed-Solomon error correction. It also explains the algorithm at a high level assuming knowledge of polynomial arithmetic and solving linear equations.

Puzzles

Collection of logic and math puzzles.