∞-Lie theory (higher geometry)
A simple Lie group is a non-abelian connected Lie group with no nontrivial connected normal subgroups.
Via Lie's theorems this is equivalent to the Lie algebra of being a simple Lie algebra (over the real numbers).
This is not the same thing as a simple object in LieGrp (or even in ). However, the Lie algebra associated to a simple Lie group is always a simple Lie algebra (although that definition also requires a non-abelian clause).
The classification of simple Lie groups consists of four infinite series – the classical Lie groups – and five separate cases – the exceptional Lie groups.
See Wikipedia's list of simple Lie groups.
graphics grabbed from Schwichtenberg
See also at ADE classification
The special unitary group is simple for all .
The special orthogonal group is simple at least for (corresponding to SO(8)), hence so are the corresponding spin groups.
See also
Last revised on August 29, 2019 at 04:00:02. See the history of this page for a list of all contributions to it.