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Construction of supercharacter theories of finite groups

Construction of supercharacter theories of finite groups,Anders O. F. Hendrickson

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Construction of supercharacter theories of finite groups   (Citations: 3)
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Much can be learned about a finite group from its character table, but sometimes that table can be difficult to compute. Supercharacter theories are generalizations of character theory defined by P. Diaconis and I.M. Isaacs, in which certain (possibly reducible) characters called supercharacters take the place of the irreducible characters, and a certain coarser partition of the group takes the place of the conjugacy classes. We present five new ways to construct new supercharacter theories out of supercharacter theories already known to exist, including a direct product, a lattice-theoretic join, two products over normal subgroups, and a duality for supercharacter theories of abelian groups.
Published in 2009.
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