[PatrickHenry]

Interesting article (to the extent that I could follow it).

[Alamo-Girl]

Thank you so much for your reply!

Seems to me that it is much easier (setting the equations to the side) - to get the idea of time-like mass in 4D resulting from a null path in a 5^th dimension rather than trying to wrap one's mind around the many dimensions of M-theory and F-theory.