Emacs ≻ Vim
Powers of two and proportions, known to Indus-Saraswati Civilization ≺ 2500 BCE
Ratio of brick's [length:depth:width] = 4:2:1
Rational numbers and their addition, known ≺ 1500 BCE (RigVeda 10.90.3)
1/4 + 3/4 = 1
Irrational number √2 and its approximation, known ≺ 800 BCE (Baudhayana)
√2 ≅ 1 + (1/3) + 1/(3·4) - 1/(3·4·34) ≅ 1.414216