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math.GR2023
Finite p-groups with at most p2 + p subgroups not in Chermak-Delgado lattice
Guojie Liu, Haipeng Qu, Lijian An
The Chermak-Delgado lattice of a finite group G is a self-dual sublattice of the subgroup lattice of G. In this paper, we determine finite p-groups with at most p2 + p subgroups no…
math.GR2023
A note on the bound for the class of certain nilpotent groups
Jixia Gao, Haipeng Qu
Assume G is a nilpotent group of class > 3 in which every proper subgroup has class at most 3. In this note, we give the exact upper bound of class of G.