Are the unitary group, the special unitary group and the projective special unitary group quotiented by a U(1) subgroup reductive? For example is SU(n)/U(n-1) a reductive homogeneous space?
2026-05-05 22:32:38.1778020358
Are the unitary group, the special unitary group and the projective special unitary group quotiented by a U(n-1) subgroup reductive?
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