A counterexample for lightning flash modules over E(e 1, e 2)

David Benson, Robert R. Bruner

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)
5 Downloads (Pure)


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.
Original languageEnglish
Pages (from-to)323-325
Number of pages3
JournalArchiv der Mathematik
Issue number4
Early online date23 Feb 2016
Publication statusPublished - Apr 2016


  • steenrod algebra
  • lightning flash
  • graded exterior algebra


Dive into the research topics of 'A counterexample for lightning flash modules over <i>E(e 1, e 2)</i>'. Together they form a unique fingerprint.

Cite this