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| * The circle group $S^1 \subset \C^*$. | * The circle group $S^1 \subset \C^*$. | ||
| * The n-dimensional torus $\T^n = (\S^1)^n$. | * The n-dimensional torus $\T^n = (\S^1)^n$. | ||
| - | * Important subgroups of $GL(n, \R)$ and $GL(n, \C)$ | + | * Important subgroups of $GL(n, \R)$ and $GL(n, \C)$ (later when we know how to produce subgroups) |
| * special orthogonal group $SO(n, \R)$, | * special orthogonal group $SO(n, \R)$, | ||
| * Lorentz group $SO(1,3)$ , | * Lorentz group $SO(1,3)$ , | ||