The logo is inspired by a nice proof of a very used mathematical equation. I first saw this proof of Pythagoras here: Impossible squares – Numberphile. Strange that I never came across a proof before. Anyway, Here’s the short version.
The area of the large square is (a+b)^2.
The area of the small square is c^2.
The area of one triangle is \frac{1}{2}\cdot a\cdot b.
The sum of the area of the small square and four triangles equals the area of the big square: c^2 + 4\cdot\frac{1}{2}\cdot a\cdot b = (a+b)^2.
This can be expanded to: c^2 + 2\cdot a\cdot b=a^2 + b^2 + 2\cdot a\cdot b.
Which can be simplified to c^2=a^2+b^2.