Hyperbolic Spaces   dimensional   I found this page to be somewhat informative but then I think I might be in a little over my head too I thought I would make this one comment though To me a person of limited geometry skills the most disturbing aspect to this hyperbolic geometry is the expandability of it to at least a rd dimension In Euclidean space it is fairly easy to imagine a rd dimensions being added to the nd One could visualize it as the difference between a single sheet of paper and a stack of papers If I try to imagine how to expand the hyperbolic  dimensional plane into a rd dimension I find that it doesnt work so well In fact it seems like the hyperbolic plane as a stack of curved papers still invades the Euclidean  dimensional space Actually come to think of it even the  dimensional hyperbolic space seems dependent on the Euclidean  dimensional space If anyone would care to comment on how to visualize a  dimensional hyperbolic space I would be interested in reading it