activity
20192026
most citedThe category of extensions and a characterisation of -exangulated functors

12 citations · 14 across the 7 of their papers we have counts for

collaborators

9 papers

math.RT2026

Higher torsion classes, -tilting theory and silting complexes

Jenny August, Johanne Haugland, Karin M. Jacobsen +3

Initiated in work by Adachi, Iyama and Reiten, the area known as -tilting theory plays a fundamental role in contemporary representation theory. In this paper we explore a highe…

math.RT2025

Higher Koszul algebras and the -condition

Johanne Haugland, Mads Hustad Sandøy

Determining when a finite dimensional algebra satisfies the finiteness property known as the -condition is of fundamental importance in the celebrated and influentia…

math.CT2023

The category of extensions and idempotent completion

Raphael Bennett-Tennenhaus, Johanne Haugland, Mads Hustad Sandøy +1

Building on previous work, we study the splitting of idempotents in the category of extensions associated to a pair $(\mathcal{C},\math…

math.RT2023★ 1 cited

A characterisation of higher torsion classes

Jenny August, Johanne Haugland, Karin M. Jacobsen +3

Let be an abelian length category containing a -cluster tilting subcategory . We prove that a subcategory of is a -torsion class if a…

math.CT2022★ 12 cited

The category of extensions and a characterisation of -exangulated functors

Raphael Bennett-Tennenhaus, Johanne Haugland, Mads Hustad Sandøy +1

Additive categories play a fundamental role in mathematics and related disciplines. Given an additive category equipped with a biadditive functor, one can construct its category of…

math.RT2021

The role of gentle algebras in higher homological algebra

Johanne Haugland, Karin M. Jacobsen, Sibylle Schroll

We investigate the role of gentle algebras in higher homological algebra. In the first part of the paper, we show that if the module category of a gentle algebra contains a …

math.RT2021

Higher Koszul duality and connections with -hereditary algebras

Johanne Haugland, Mads Hustad Sandøy

We establish a connection between two areas of independent interest in representation theory, namely Koszul duality and higher homological algebra. This is done through a generaliz…

math.CT2019

The Grothendieck Group of an -exangulated Category

Johanne Haugland

We define the Grothendieck group of an -exangulated category. For odd, we show that this group shares many properties with the Grothendieck group of an exact or a triangulat…

math.CT2019★ 1 cited

Auslander-Reiten triangles and Grothendieck groups of triangulated categories

Johanne Haugland

We prove that if the Auslander-Reiten triangles generate the relations for the Grothendieck group of a Hom-finite Krull-Schmidt triangulated category with a (co)generator, then the…