I do not know yet, please hold on.
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
I was up all night yesterday dealing with some complex 'paperwork' (on the computer), but was able to check in here from time to time - which gave me some relief.
So tonight I'd better call it a day.
"The good news about computers is that they do what you tell them to do. The bad news is that they do what you tell them to do." - Ted Nelson