arXiv · math/0401328
Let $G$ be a finite $p$-group and $χ,ψ$ be irreducible characters of $G$. We study the character $χψ$ when $χψ$ has at most $p-1$ distinct irreducible constituents.
Edith Adan-Bante. 2004-01-23. Products of Characters and Finite $p$-groups III. https://arxiv.org/abs/math/0401328
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