How can we be sure that there are only four dimensions?
5612
How to prove that we are living in a 3+1D world?
32625
More than one time dimension
87833
Volumes of n-balls: what is so special about n=5?
143929
dimension of a connected Manifold
141794
Invariant subspaces of specific dimension
10209
How to show the spacetime interval is invariant in general?
142097
Finding the dimension of the orthogonal complement
101201
How do we know the size of the universe?
50965
Gravitational constant in higher dimensions?
53131
What is the name for the region enclosed by an $n$ dimensional object?
34520
Is $0\,\mathrm{m}$ dimensionless?
142503
There are no compact minimal surfaces
65230
Expressing points in fractional dimensions?
102192
Can someone explain geometric multiplicity?
37991
How many different sizes of infinity are there?
124631
Why are we not able to visualize Dimensions beyond 3 (or maximum 4 including time)?
86423
Dimension & non - locality problem in string theory