Johan Öinert

activity

20102026

most citedSimplicity and maximal commutative subalgebras of twisted generalized Weyl algebras

13 citations · 46 across the 21 of their papers we have counts for

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3 papers · 1 filter

math.RA2026

Invertibility of structured perturbations of singular matrices over unital rings

Johan Öinert

In this article, we study the invertibility of matrices of the form $A + E D F$ , where $A$ and $D$ are square matrices over a unital, not necessarily commutative, ring and $A$ is singu…

math.RA2026

Very good gradings on structural matrix rings

Patrik Lundström, Johan Öinert, Laura Orozco +1

Let $R$ be a nonzero associative unital ring, let $G$ be a group, and let $ρ$ be a preorder on ${1, \dots, n}$ . A $G$ -grading on $ρ$ induces a very good $G$ -grading on the structu…

math.RA2026

Hilbert's basis theorem for Poisson Ore extensions

Per Bäck, Patrik Lundström, Johan Öinert +1

We prove an analogue of Hilbert's basis theorem for Poisson Ore extensions and Poisson Laurent Ore extensions. We also obtain corresponding results for iterated Poisson Ore extensi…