- #1
Jim Kata
- 197
- 6
I am not very well read so this may already exist as a theorem. If not, try to prove it, or disprove it.
Let G be a compact group over the reals, then the maximally compact subgroup of the complexification of G is just G over the reals.
That is the maximally compact subgroup of [tex]G_\mathbb{C}[/tex] is just [tex]
G\left( \mathbb{R} \right)
[/tex]
Here's a simple example:
SU(2) is the maximal compact subgroup of [tex]
Sl\left( {2,\mathbb{C}} \right)
[/tex]
And [tex]
SU(2)_\mathbb{C} \cong Sl\left( {2,\mathbb{C}} \right)
[/tex]
Let G be a compact group over the reals, then the maximally compact subgroup of the complexification of G is just G over the reals.
That is the maximally compact subgroup of [tex]G_\mathbb{C}[/tex] is just [tex]
G\left( \mathbb{R} \right)
[/tex]
Here's a simple example:
SU(2) is the maximal compact subgroup of [tex]
Sl\left( {2,\mathbb{C}} \right)
[/tex]
And [tex]
SU(2)_\mathbb{C} \cong Sl\left( {2,\mathbb{C}} \right)
[/tex]