| What happens to physics when the dimensionality of spacetime is not equal to the four we know and usually love? |
| Figure 4 shows the spacetime cylinder slit open along Albert's world line and flattened to a rectangle. |
| Gis the Einstein tensor in curved spacetime and T is an unknown tensor with mixed symmetry which is actually specified by that vertical bar. |
| The photons that reached its senses followed paths that varied slightly from the straight-line geodesics of flat spacetime. |
| The full four-dimensional space, or five-dimensional spacetime, is referred to as the bulk. |
| This field obeys the expected equations of motion for an electromagnetic vector potential in four spacetime dimensions. |
