If one digs long enough, Kahan pops up. Inverse square root.

[Wes Loewer]

(10-03-2023 07:37 AM)pier4r Wrote:  What I find funny (and sad) is that somehow people think that back then people were plain stupid or without equipment.

I had the opposite reaction from a Geometry student once. When I was explaining how the Greeks figured it all out without calculators or computers, one student replied, "Wow, they were really smart back then."

Indeed they were.