Chad Cooper wrote:
>
>Let me remind everyone that these are representations or models based on
>popular belief that the Universe has boundaries. I have not read any
>literature that convinces me that there are boundaries, hence a shape to the
>big U. I know this is very controversial, but I strongly disagree with the
>Big Bang Theory.
>
There are no boundaries if the big U is, spatially, a S<sup>3</sup> [*]
Alberto Monteiro
[*] the three dimensional surface that can be represented immersed
in R<sup>4</sup> by the equation x^4 + y^4+ z^4 + w^4 = 1
