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math.GR2002
An invariant of simple algebraic groups
R. Skip Garibaldi
The Rost invariant associated with a simple simply connected algebraic group G is used to define an invariant of strongly inner forms of G. This invariant takes values in a quotien…
math.RA2002
The characteristic polynomial and determinant are not ad hoc constructions
R. Skip Garibaldi
The typical definition of the characteristic polynomial seems totally ad hoc to me. This note gives a canonical construction of the characteristic polynomial as the minimal polynom…