Sierpinski Triangle as a Pink Triangle LGBTQ+ Key Ring

The Sierpiński triangle (sometimes spelled Sierpinski) is a fractal attractive fixed set with the overall shape of an equilateral triangle, subdivided recursively into smaller equilateral triangles. It is named after the Polish mathematician Wacław Sierpiński, but appeared as a decorative pattern many centuries before the work of Sierpiński. A pink triangle has been a symbol for various LGBTQ identities, initially intended as a badge of shame, but later reclaimed as a positive symbol of self-identity.