Leonhard Euler (1707-1783) was surely one of the most prolific of great mathematicians. Among his contributions, we need to mention two, each of which comes down to us as a single letter: the letter e and the letter i . If we were literally to "pay"tribute, we might do so in increments of $2.72, rounding up a bit the value of irrational e. We'll get to that. First: biography. Euler was born in Basel, Switzerland, so his life and work might fittingly be considered a riposte to the old anti-Swiss jibe (originally from The Third Man ) that Switzerland has produced nothing for all its years of peace and democracy, nothing more than the humble cuckoo clock. Since Euler’s day and because of his work, i has stood for the simplest of the numbers that Descartes had called “imaginary.” This i refers to the square root of -1. We don’t need to bother ourselves further with the question “ what is the square root of -1?” It is i , by stipulation. Also since Eul...
I hereby inform my readers that I will not be doing the usual post-Supreme-Court term round-up this year. Most Julys for many years now, I have devoted four long blog entries to the term of the US Supreme Court that has just ended. This year, I'm not feeling it. There have been a lot of intriguing decisions this term. I have written posts on some of they as we have proceeded. But the elaborate round-up? No thanks. And ...sorry to disappoint. By the way, the fact that I have just been using the word "round-up" reminds me of the fact that one of the cases decided by the Court this term literally did involve a product named Round Up. https://www.supremecourt.gov/opinions/25pdf/24-1068_n7ip.pdf