Soliton solution to the sine-Gordon equation
More from Chalkdust
On the cover: Folding hydrogels, encoding mathematics
Ellen Jolley and Kat Phillips know when to hold, and when to fold
Significant figures: Sofya Kovalevskaya
Nora Koparan tells the story of the first female professor of mathematics
I’m counting on it
Joe Celko looks at four different abacuses used throughout history
Four ways Photoshop encourages thinking mathematically
How processes used in image editing are related to mathematics!
What’s your least favourite number?
Read about our least favourite numbers in this collection from issue 5!
Roots: Pythagoras of Samos
Pythagoras gave us so much more than a² + b² = c²