Noelia Rizo

activity

20162025

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Showing 2021Show all

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math.GR2021

The blocks with four irreducible characters

J. Miquel Martínez, Noelia Rizo, Lucía Sanus

Suppose that $B$ is a Brauer $p$ -block with defect group $D$ . If $B$ exactly contains 4 irreducible characters, then we show that $D$ has order 4 or 5, assuming the Alperin--McKay…

math.GR2021

Kernels of p'-degree irreducible characters

Alexander Moretó, Noelia Rizo

We prove a p'-version of a classical theorem of Broline and Garrison. As a consequence, we obtain results on p-parts of character codegrees.