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Seminormal subgroup
From Wikipedia, the free encyclopedia
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In mathematics, in the field of group theory, a subgroup of a group is termed seminormal if there is a subgroup such that , and for any proper subgroup of , is a proper subgroup of .
This definition of seminormal subgroups is due to Xiang Ying Su.[1][2]
Every normal subgroup is seminormal. For finite groups, every quasinormal subgroup is seminormal.
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