Swordmaster Dragon
So (if you don't mind sharing) what's your plan of action with the thread? You could generalize the worldline concept into multiple dimensions, but that doesn't seem like your style. Include more on the nature of this method? Springboard straight into relativity?
Straight into relativity. After the concept of spacetime itself, I plan to introduce the Minkowski metric and derive the Lorentz transformation directly from it. It's not as hard as it might sound--it is a hyperbolic rotation, the reasons for it being so being quite natural. That is why I included rotations and hyperbolic trigonometric functions in the math review. I will generalize to more than 1+1-dimension, but not for a while yet.
I really ought to get back to writing that. Right now, problems involving series are distracting me--but you ought to find that series-extraction method I've posted in the math guild interesting. It can be easily framed in terms of linear algebra.