Having seen ’21’ I enjoyed the references to basic maths, changing variables, and non-linear solutions in a cultural (as opposed to a maths) way. Also loved the bit at the end where Laurence Fishburne is in his retirement gear, poolside, reading the newspaper upside down.

On a lateral note it struck me this could be viewed as an example of complexity-maths, but as I’m no mathematican I’m not sure:

“Avraham Trakhtman has ended the mystery of the Road Colouring Problem by proving the theory of a “universal map” which allows a journey to end at a certain destination whatever the starting point by following the same instructions.

“In a diagrammatic version of the conjecture – now a theorem thanks to Professor Trakhtman – a 16-line graph forming one square and eight triangles, with the lines coloured red or green, includes two vertices, each representing different destinations. Following the route “blue red red” repeated three times always leads to one, and following “blue, blue red” always leads to the other, whatever the starting point.

“Professor Trakhtman said that it took him a year to solve the problem. But he insisted to AP: “The solution is not that complicated. It’s hard, but it is not that complicated. Some people think they need to be complicated. I think they need to be nice and simple.”