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A class of quadratic matrix equations over finite fields
Published 28 Aug 2020 in math.RA | (2008.12457v3)
Abstract: We exhibit an explicit formula for the cardinality of solutions to a class of quadratic matrix equations over finite fields. We prove that the orbits of these solutions under the natural conjugation action of the general linear groups can be separated by classical conjugation invariants defined by characteristic polynomials. We also find a generating set for the vanishing ideal of these orbits.
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