Is imaginary time a fifth dimension?
93652
The meaning of imaginary time
132525
Real Numbers Raised to Imaginary Powers?
19497
Analogue of spherical coordinates in $n$-dimensions
144556
What exactly is a dimension?
144771
Is there any thing composed of elementary particles in this world that is not 3 dimensional?
122357
Discreteness of Spacetime and Violation of Lorentz symmetry
71085
In Einstein's General Relativity, do the space-time dimensions curve?
151425
Does $\mathbb{R}^n$ have a real vector space structure with dimension other than $n$?
118288
Complex structure on $\mathbb S^1 \times \mathbb S^3$
50965
Gravitational constant in higher dimensions?
35206
Minkowski Dimension of Special Cantor Set
34520
Is $0\,\mathrm{m}$ dimensionless?
121904
Regarding the possibility of Closed Timelike Curves
35694
Can virtual particles be thought of as off-shell Fourier components of a field?
70332
Is there a third dimension of numbers?
1162
Why $\{\mathbf{0}\}$ has dimension zero?
131128
Why time is considered a dimension?