Mathematics

General

Knot identification tool by Joshua Horowitz.
Another Knot Identification tool by Kyle Miller.
Knotplot. (Example, a Brunnian link from Knotplot.)
Charles Livingston’s Table of Knot Invariants, unbelievably useful.
The Knot Atlas
Knot Sketcher A java program which lets you draw a knot and returns the DT-notation.
Low-dimensional Topology programs – by Nathan Dunfield.
Resources on the History of Knot Theory – by Andrew Ranicki
Knotilus – very cool.
Borromean Rings Quilts I and II – by Barbara Nimershiem.
Visualization in geometric knot theory

Jeff Week’s games: includes tic-tac-toe on the torus and klein bottle, flying through hyperbolic 3-space and more.
Hyperbolic games like sudoku on a hyperbolic disk…

Why did the chicken cross the road?
- More answers… by David Madore.
- Spiked math answer
Big Game Hunting A contribution to the mathematics of big game hunting (or how to catch a lion) by H. Petard.

The perfect tip from Math Fail.
If the IRS had discovered the quadratic formula… by Daniel J. Velleman.
Declaration of linear independence: In Euclidean Space, Jan 28, 1988, by David J. Grabiner.
AMS article on math humor Foolproof: A sampling of mathematical folk humor by Paul Renteln and Alan Dundes.

sarah-marie belcastro has a fantastic page on mathematical knitting and mathematical fiber arts. It’s my go-to page for information on this.
The Crochet Coral Reef project is exhibited at many museums and art galleries around the world.
Want more information? Click here.

Organizations
- The Ringing World UK.
- Dove’s Guide
- The website for the North American Guild of Change Ringers is here.
- The website for the MIT Guild of Bellringers is here.
- The website for the Australian and New Zealand Association of Bellringers is here.
What is Change Ringing?
- Click here for an excellent summary from the North American Guild of Change Ringers.
- Click here for an animation of a person ringing a bell.
There are some fantastic videos on youtube of change ringing in action. Some of our favorites include:
- Trinity Church in New York City. Rounds on 12 bells.
- Spliced Bristol Surprise Major and Stedman Triples.
- A nice touch of Grandsire Triples Leeds UK.
- Rounds at Westminster Abbey. At the end, they go into Stedman Caters:
- Some Cambridge Surprise Royal at St Pauls Church Birmingham UK.
- Hosanna. A really big bell (7.5 ton) at Buckfast Abbey.
- Dunsford Bells in Devon (You see the bells moving in this one.)