Posted by:
Brother Of Jerry
(
)
Date: August 08, 2020 02:41AM
Until the End of Time, Brian Greene. A book speculating on the full history of the universe.
God: an Autobiography, franco Ferrucci. A quick read, and pretty funny. God was lonely in the void, and started creating stuff. He discovered that he can create, but can't uncreate. His creations have to run their course. The universe is pretty ad hoc, and a case of on the job training, something I've always thought.
On deck: In the Hands of the People: Thomas Jefferson.... , Jon Meacham
Napoleon: a Life, Andrew Roberts. I had an annual (or sometimes semi-annual) tradition with a friend of inflicting on each other books that we had read. His books to me were usually top shelf stuff, and this was the last one he gave to me, just as the pandemic kicked in. I saw up-thread where Lot's Wife pointed out this book is also top shelf. He passed away a couple weeks ago, untreatable stage 4 cancer, so I will move this one to the top of the queue to honor the memory of my friend. Gone too young.
In other news, Eric K made a comment recently about having to practice his music. It occurred to me that I should do some math practice. I do some sporadically, but there was something that I never learned how to do: draw a pentagon with straight edge and compass. So I dug out books, and went online, and found various ways to draw a pentagon. Most were complicated and unintuitive, but I found one that was considerably simpler and clearer. I wondered why the other explicators weren't aware of this. And why does it work.
That took me down a rabbit hole, that eventually led me to a fourth power polynomial of trig functions, something completely new to me. It was in such a form that the quadratic formula still worked even though it was fourth power. Pretty serious gymnastics for a problem that the Pythagoreans had solved in 600 BCE.
So I now can draw a perfect pentagon, and as a bonus know how to calculate the symbolic value of sin(pi/5). Pi/2, Pi/3, pi/4 and pi/6 are easy. Sin(pi/5) leads to that ugly equation.
OK, more than you wanted to know, but I had fun. ;)