Quadron app for iPhone and iPad
4.1 (
8231 ratings )
Games
Entertainment
Puzzle
Strategy
Developer: S.MARSAULT
1.99 USD
Current version: 1.2, last update: 7 years agoFirst release : 21 Jan 2011
App size: 7.37 Mb
Fed up with Sudoku? Try Quadron and discover the famous 4 colours theorem! 2970 levels, hours of entertainment.
The 4 colours conjecture was first proposed in 1852 when Francis Guthrie, while trying to color the map of countries of England, noticed that only four different colors were needed. It has been notorious for attracting a large number of false proofs and disproofs in its long history.
It was proven in 1976 by Kenneth Appel and Wolfgang Haken. It was the first major theorem to be proved using a computer.
Features:
- 2970 problems to solve
- sober and elegant interface
- listen to your own music