Lond, DanielMartin, Benjamin2018-10-012018-10-012018-03-01Lond, D & Martin, B 2018, 'On a question of Külshammer for homomorphisms of algebraic groups', Journal of Algebra, vol. 497, pp. 164-198. https://doi.org/10.1016/j.jalgebra.2017.08.0310021-8693ArXiv: http://arxiv.org/abs/1610.09665v1ORCID: /0000-0002-6670-0857/work/47626995http://hdl.handle.net/2164/11206Some of the work in this paper was carried out by the first author during his PhD [15]. Both authors acknowledge the financial support of Marsden Grants UOC0501, UOC1009 and UOA1021. We are grateful to Dave Benson and Günter Steinke for helpful conversations. We also thank the referee for their careful reading of the paper.35454241engRepresentations of algebraic groupsreductive algebraic groupsconjugacy classesnonabelian 1-cohomologyQA MathematicsQAJournal article10.1016/j.jalgebra.2017.08.031https://arxiv.org/abs/1610.09665497