Presentations of Schur and Specht modules in characteristic zero
Abstract
New presentations of Specht modules of symmetric groups over fields of characteristic zero have been obtained by Brauner, Friedmann, Hanlon, Stanley and Wachs. These involve generators that are column tabloids and relations that are Garnir relations with maximal number of exchanges between consecutive columns or symmetrization of Garnir relations with minimal number of exchanges between consecutive columns. In this paper, we examine Garnir relations and their symmetrization with any number of exchanges. In both cases, we provide sufficient arithmetic conditions so that the corresponding quotient is a Specht module. In particular, in the first case this yields new presentations of Specht modules if the parts of the conjugate partition that correspond to maximal number of exchanges greater than 1 are distinct. These results generalize the presentations mentioned above and offer an answer to a question of Friedmann, Hanlon and Wachs. Our approach is via representations of the general linear group.
Cite
@article{arxiv.2312.05478,
title = {Presentations of Schur and Specht modules in characteristic zero},
author = {Mihalis Maliakas and Maria Metzaki and Dimitra-Dionysia Stergiopoulou},
journal= {arXiv preprint arXiv:2312.05478},
year = {2024}
}
Comments
This version of the paper differs from the published version as follows. A typo in the statement of Corollary 4.4 and Corollary 6.1 has been corrected, instead of $j=1,\dots, b$, it should be $j=1, \dots, k$. Also, in the statement of Theorem 6.2 it should be $j=1,\dots, \mu_{c+1}$. Examples 6.3(1) and 6.3(3) have been corrected accordingly