The full group of isometries of some compact Lie groups endowed with a bi-invariant metric
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https://doi.org/10.33044/revuma.2737Abstract
We describe the full group of isometries of absolutely simple, compact, connected real Lie groups, of $S\mathcal{O}(4)$, and of $U(n)$, endowed with suitable bi-invariant Riemannian metrics.
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