🔬 Discovery

Koch curve

Curva de Koch

Date
1904 · confidence high
Place
Stockholm, Sweden
Credited to
Helge von Koch
Field
Knowledge & symbols

What was discovered

Von Koch built a continuous curve that, surprisingly, has no tangent anywhere: it is obtained by repeatedly replacing the middle third of each segment with two sides of an equilateral triangle, a process that can be repeated infinitely. The closed snowflake version, with infinite perimeter but finite area, was later popularized as one of the first examples of a fractal.

The closed "snowflake" form does not appear in the original 1904 article, but in later work.

What it led to

  • Mandelbrot's fractal geometry
  • Canonical examples of pathological curves in analysis

Built on

  • Weierstrass's continuous nowhere-differentiable function

Links

Sources✓ verified 2026-09-28