For those of you interested in having a peek at Maria Gaetana Agnesi, the woman for whom the mathematical formula “Witch of Agnesi” was named: here you go.
And for more on witches more generally, here are a few of our favorite posts:
Why Call It A Witch?
Image from the book Professor Stewart’s Cabinet of Mathematical Curiosities by Ian Stewart. Excerpted by arrangement with Basic Books, a member of the Perseus Books Group. Copyright © 2009.