Well, a man named Hausdorff in 1919 introduced a number which was just a mathematical joke, and I found that this number was a good measurement of roughness.
Vīrs vārdā Hausdorfs 1919. gadā ieviesa skaitli, kas bija vienkārši matemātisks joks. Un es atklāju, ka šis skaitlis bija labs raupjuma mērs.