One of my sons got AI to read every post in this blog and summarize it.  I think every regular reader will enjoy the results--I certainly did. There is only one reference that I do not understand--I will have to look it up.  Here it is:https://drive.google.com/file/d/1M6ZgIXvBTMPUswNTjJn9q1jKlKhTz-hd/view?usp=sharingHistory Unfolding