The Problem with Christians

[AJW333]

The multiverse theory is basically saying that other dimensions exist. This isn't in conflict with the Scriptures. The 12th century Hebrew scholar Nachmonides concluded from his studies of the book of Genesis that the universe has ten dimensions: four are knowable and six are beyond perception..

Citation needed.

He claimed a 13th century Rabbi named Nachmanides had determined from Genesis that the Universe contained 10 dimensions, and thus discovered something in the Bible that scientists would not learn for another seven centuries. Thus the literal interpretation of Genesis was validated. I had to point out to him that there is no record of Nachmanides making this claim...

http://www.apatheticagnostic.com/article...d1037.html

Couldn't find one so I will concede that there is insufficient evidence for the statement. Interestingly the same website you sited for there being no reference did say this;

Note:
* Interestingly, Nachmanides, in an attempt to describe how God created everything out of nothing, did suggest the universe was originally the size of a mustard seed which then expanded.
...At the briefest instant following creation all the matter of the universe was concentrated in a very small place, no larger than a grain of mustard. The matter at this time was very thin, so intangible, that it did not have real substance. It did have, however, a potential to gain substance and form and to become tangible matter. From the initial concentration of this intangible substance in its minute location, the substance expanded, expanding the universe as it did so. As the expansion progressed, a change in the substance occurred. This initially thin noncorporeal substance took on the tangible aspects of matter as we know it. From this initial act of creation, from this ethereally thin pseudosubstance, everything that has existed, or will ever exist, was, is, and will be formed.