Abstract:
The notation of number line was formed in XX c. We consider the generation of this conception in works by M. Stiefel (1544), Galilei (1633), Euler (1748), Lambert (1766), Bolzano (1830-1834), Meray (1872), Cantor (1872), Dedekind (1872), Heine (1872) and Weiestrass (1861-1885).