$U(p,q)$ is a indefinite unitary group with $pq\not=0$.
Is it compact? If not, what's the maximal compact subgroup?
Is it connected? How much connnected components?
What's the homotopy group of its connected component?
2026-04-08 04:14:35.1775621675
What's the compactness, connectedness and homotopy group of indefinite unitary group $U(p,q)$
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