Johnson, Marianne and Stöhr, Ralph
(2011)
*Lie powers and pseudo-idempotents.*
Canadian Mathematical Bulletin, 54 (2).
pp. 297-301.
ISSN 0008-4395

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## Abstract

We give a new factorisation of the classical Dynkin operator, an element of the integral group ring of the symmetric group that facilitates projections of tensor powers onto Lie powers. As an application we show that the iterated Lie power $L_2(L_n)$ is a module direct summand of the Lie power $L_{2n}$ whenever the characteristic of the ground field does not divide $n$. An explicit projection of the latter onto the former is exhibited in this case.

Item Type: | Article |
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Uncontrolled Keywords: | free Lie algebras, idempotents, projections |

Subjects: | MSC 2010, the AMS's Mathematics Subject Classification > 17 Nonassociative rings and algebras MSC 2010, the AMS's Mathematics Subject Classification > 20 Group theory and generalizations |

Depositing User: | Prof Ralph Stöhr |

Date Deposited: | 04 Aug 2011 |

Last Modified: | 20 Oct 2017 14:12 |

URI: | http://eprints.maths.manchester.ac.uk/id/eprint/1663 |

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