PAPPI
the tuft of hairs on each seed of thistles, dandelions, and similar plants, which assists dispersal by the wind.
(fl.c.300–350 ad), greek mathematician; known as pappus of alexandria. little is known of his life, but his collection of six books (another two are missing) is the principal source of knowledge of the mathematics of his predecessors.
(fl.c.300–350 ad), greek mathematician; known as pappus of alexandria. little is known of his life, but his collection of six books (another two are missing) is the principal source of knowledge of the mathematics of his predecessors.