Interesting nugget: the Swallowtail Catastrophe (https://mathworld.wolfram.com/SwallowtailCatastrophe.html https://mathworld.wolfram.com/SwallowtailCatastrophe.

Interesting nugget: the Swallowtail Catastrophe (https://mathworld.wolfram.com/SwallowtailCatastrophe.html https://mathworld.wolfram.com/SwallowtailCatastrophe.html), one of the seven possible, was named by the blind French topologist Bernard Morin (https://en.m.wikipedia.org/wiki/Bernard_Morin https://en.m.wikipedia.org/wiki/Bernard_Morin). It was the topic of Salvador Dali’s last work (https://en.m.wikipedia.org/wiki/The_Swallow%27s_Tail https://en.m.wikipedia.org/wiki/The_Swallow%27s_Tail)