Three Dollar Quill

I'm making slow but steady progress writing up four-dimensional physics. Right now I'm still in the realm of "just a straightforward addition of a spatial dimension". This doesn't require much creativity yet, but it does require noticing that I'm somewhat abusing notation and so sometimes I can miss a minus sign if I'm careless.

As far as "creativity yet", I think it'll be a while before I have to consider the effects of attractive forces, but once I do, I will need to make some subjective decisions.

For now, I really want to get to sleep.

Good night.