
Let G be a finite p-group, for some prime p, and $��, ��\in \Irr(G)$ be irreducible complex characters of G. It has been proved that if, in addition, $��,��$ are faithful characters, then the product $����$ is a multiple of an irreducible or it is the nontrivial linear combination of at least $\frac{p+1}{2}$ distinct irreducible characters of G. We show that if we do not require the characters to be faithful, then given any integer k>0, we can always find a p-group G and irreducible characters $��$ and $��$ such that $����$ is the nontrivial combination of exactly k distinct irreducible characters. We do this by translating examples of decompositions of restrictions of characters into decompositions of products of characters.
4 pages
20c15, FOS: Mathematics, Group Theory (math.GR), Mathematics - Group Theory
20c15, FOS: Mathematics, Group Theory (math.GR), Mathematics - Group Theory
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