A two soliton solution to the KdV equation evolving in time. It starts off with two separated lumps, which combine, then pass through each other and continue on unchanged.
More from Chalkdust
Things to make
Platonic shapes from tube maps, flexagons, and more mathematical craftWhat’s hot and what’s not
Optimal Pac-Man
Ghostbusting with graph theoryReinventing 2D
What a difference a matrix makesYour social networks
How similar are you to your friends?Art meets maths