[Alamo-Girl]

Thank you so much for the heads up to the necessity for an odd number of time dimensions! This gives me something very engaging to research (the why of it) --- no hints, please - it "sticks" better if I figure it out on my own. Hugs!

[Alamo-Girl]

Just to let you know - and for any Lurkers following - the point you both made that time dimensions must be odd, here is my first substantive find:

Why odd-space and odd-time dimensions in even dimensional spaces? (pdf)

I'm still pondering on this article and the significance with regard to brane theory. Thank y'all so much for this line of inquiry!!!