At this point the main function of this blog is to provide notes to myself so I don't lose them. It really is just a private journal in cyberspace. It is true that theoretically people other than myself can read it. But, in reality except for a very few exceptions such as my parents I don't think I actually have to worry about other people actually ever reading it. I once thought I could get a dozen regular readers for this blog. But, after more than a decade I am pretty sure now that is an impossible goal.