Classical construction of the [color=#0000ff][i]Witch of Agnesi[/i][/color] as locus.[br][br]This curve's name is attributed to Maria Agnesi, an Italian mathematician that described it into her book [url=https://archive.org/details/bub_gb_xDF_ksE24HUC]Istituzioni analitiche ad uso della gioventù italiana[/url], written in 1748, that has been the first mathematics textbook ever written by a woman.[br][br]The Italian name [i]"Versiera di Agnesi"[/i] is based on [i]versoria[/i] ([url=https://en.wikipedia.org/wiki/Sheet_(sailing)]sheet[/url] of sailing ships) and the [i]sinus versus[/i] trig identity. [br]This was mistakenly read by the translator John Colson as [i]l’avversiera di Agnesi[/i], where [i]avversiera[/i] is translated as "woman who is against God" and interpreted as "witch".[br][br]