Kronecker modules generated by modules of length 2
Abstract
Let be a ring and a class of -modules. A -module is said to be generated by provided that it is a factor module of a direct sum of modules in . The semi-simple -modules are just the -modules which are generated by the -modules of length 1. It seems that the modules which are generated by the modules of length (we call them bristled modules) have not attracted the interest they deserve. In this paper we deal with the basic case of the Kronecker modules, these are the (finite-dimensional) representations of an -Kronecker quiver, where is a natural number. We show that for , there is an abundance of bristled Kronecker modules.
Keywords
Cite
@article{arxiv.1612.07679,
title = {Kronecker modules generated by modules of length 2},
author = {Claus Michael Ringel},
journal= {arXiv preprint arXiv:1612.07679},
year = {2017}
}
Comments
25 pages. The main result is improved: it uses now the optimal number of n+2 bristles (not 2n-1, as the first version)