Groups with metamodular subgroup lattice
M. De Falco, F. de Giovanni, C. Musella, R. Schmidt (2003)
Colloquium Mathematicae
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A group G is called metamodular if for each subgroup H of G either the subgroup lattice 𝔏(H) is modular or H is a modular element of the lattice 𝔏(G). Metamodular groups appear as the natural lattice analogues of groups in which every non-abelian subgroup is normal; these latter groups have been studied by Romalis and Sesekin, and here their results are extended to metamodular groups.