Maybe you learned the equation as e^[i(pi)] = -1 That's how I learned it in high school, but I can't remember whether I was a sophomore or a junior. At this point, it is difficult for me to remember high school. In college I took theoretical calculus as a freshman, and we had to do a lot of proofs. After that, I took no more math classes and switched my major from physics to English and German literature. My physics professor as a freshman was Dr. Rorschach, the brother of the man who invented the Rorschach ink blot test. When I took that test as a freshman in college, my psychologist told me that the test revealed that I had repressed emotions, as I made no interpretations based on color; i.e., all my responses were based on shapes, regardless of the colors in the inkblots.

Same tree, different angles on walk around a park on Monday. Can't decide which one I like better

The grand prize hand-carved chair that I won at a gallery opening here in New Mexico years ago. I love it still!

That is a hard one - not very many in my photo files either - but I did find this one... And this one - but I do think they are more accurately described as plinths...