
Let \((R,\Lambda)\) be a commutative form ring, and let \((J,\Gamma)\) be a form ideal of \((R,\Lambda)\). A complete description of all subgroups of the unitary groups \(U_{2n}(R,\Lambda)\) which are normalized by the relative elementary subgroup \(EU_{2n}(J,\Gamma)\) is obtained for all \(n\geq 4\).
Algebra and Number Theory, unitary groups, Chains and lattices of subgroups, subnormal subgroups, elementary matrices, form rings, Other matrix groups over rings, subnormal subgroups
Algebra and Number Theory, unitary groups, Chains and lattices of subgroups, subnormal subgroups, elementary matrices, form rings, Other matrix groups over rings, subnormal subgroups
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