RE: [tuning] doulbe N-tET periodicity blocks

Carl wrote,

>I know I could stand to understand better what happens to a block when
notes
>are transposed by unison vectors -- an issue raised in the gentle
>introduction
>series but never fully explored. What do you think of an "excursion" on
>that,
>Paul?

Well, that is what the existing "excursion" is about -- in a special case.

>If Kees' idea is right, then triple blocks should exist as well.

I could stand to understand these things better as well. Due to an error in
my program, I wasn't able to find any 3-d examples of "doubles", and then
Kees found a 2-d example, though an unwieldy one. I'll try to find some
simpler 2-d examples so we can see more clearly what is going on.