I was watching some utube video describing the dimensions (up to 10 - i only watched till 5 or 6 though). But then it came to me:
true dimensions are at:
1, 2, 3, 5, 7, aaaaand 1!
so really there would be 10 mathematical dimensions and the next true dimension (11) would then function as did "1-D" only at the next order of magnitude.