immutable. The corollary of this is extremely important. An infinite cosmos cannot be multiplied nor divided. It
What do you mean by cosmos? It seems you distinguish it from the universe which you describe as finite. Do you mean something 'outside' the universe? I think that's more of a psychological desire. Still, even the universe might turn out to be infinite, so all your comments can apply to that too.
anything that is truly infinity must contain everything; there cannot be two infinities, because each would have to contain the other.
There isn't that requirement. For example how many integers are there? Infinitely many. Now how many real numbers are there? Also infinity. But yet the infinite set of integers is only a proper subset of the apparently larger and more inclusive set of real numbers. Mathematicians call these "countable infinity" and "uncountable infinity". I guess there are other ways to classify different types of infinities too.
there is a passage through time involved, but in the Photon’s F of R it is at A and B, and in the Earth’s atmosphere all at the same infinite point.
If it slows in the Earth's atmosphere then it's <c, so it experiences passage of time, so it's not at A and B simultaneously.
