Jonathan Elmer

collaborators

4 papers

math.AC2025

The differential invariants of $S L_{2} (F_{3})$ acting on trace-free matrices over $F_{3}$

Jonathan Elmer, Anja Meyer

Let $M$ denote the vector space of $2 \times 2$ matrices with coefficients in $F_{3}$ and trace zero. Let $G = S L_{2} (F_{3})$ . Then $G$ acts on $M$ via conjugation. Let…

math.RT2025

Some formulae relating modular representations of elementary abelian $p$ -groups

Jonathan Elmer, Kazal Kadr

Let $p > 0$ be a prime, $k$ a field of characteristic $p$ and $G$ and elementary abelian $p$ -group of order $q = p^{n}$ . Let $W$ be an indecomposable $k G$ -module of dimension 2 and def…

math.RT2025

The separating variety for matrix invariants

Jonathan Elmer

Let $G$ be a linear algebraic group defined over an algebraically closed field $k$ , and let $V$ be a vector space on which $G$ acts linearly. The separating variety $\mathcal{S}_{G…

math.AC2025

Cohen-Macaulay modules of covariants for cyclic $p$ -groups

Jonathan Elmer

Let $G$ be a a finite group, $k$ a field of characteristic dividing $∣ G ∣$ and and $V, W$ $k G$ -modules. Broer and Chuai showed that if $codim (V^{G}) \leq 2$ then the module of…

The differential invariants of SL2​(F3​) acting on trace-free matrices over F3​

Some formulae relating modular representations of elementary abelian p-groups

The separating variety for matrix invariants

Cohen-Macaulay modules of covariants for cyclic p-groups

The differential invariants of $S L_{2} (F_{3})$ acting on trace-free matrices over $F_{3}$

Some formulae relating modular representations of elementary abelian $p$ -groups

Cohen-Macaulay modules of covariants for cyclic $p$ -groups