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.
|Number of pages||3|
|Journal||Archiv der Mathematik|
|Early online date||23 Feb 2016|
|Publication status||Published - Apr 2016|
- steenrod algebra
- lightning flash
- graded exterior algebra