Logo image
Three variations on the linear independence of grouplikes in a coalgebra
Preprint   Open access

Three variations on the linear independence of grouplikes in a coalgebra

Gérard Duchamp, Darij Grinberg and Vincel Minh
arXiv.org
23 Sep 2020
url
https://doi.org/10.48550/arxiv.2009.10970View
Preprint (Author's original)arXiv.org - Non-exclusive license to distribute Open

Abstract

Mathematics - Combinatorics Mathematics - Quantum Algebra
The grouplike elements of a coalgebra over a field are known to be linearly independent over said field. Here we prove three variants of this result. One is a generalization to coalgebras over a commutative ring (in which case the linear independence has to be replaced by a weaker statement). Another is a stronger statement that holds (un-der stronger assumptions) in a commutative bialgebra. The last variant is a linear independence result for characters (as opposed to grouplike elements) of a bialgebra.

Metrics

5 Record Views

Details

Logo image