A Counterexample for Lightning Flash Modules over E(e1,e2)

Published 3 Jul 2015 in math.RT and math.AT | (1507.01039v2)

Abstract: We give a counterexample to Theorem 5 in Section 18.2 of Margolis' book, "Spectra and the Steenrod Algebra", and make remarks about the proofs of some later theorems in the book that depend on it. The counterexample is a module which does not split as a sum of lightning flash modules and free modules.

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