Torben Wiedemann

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math.GR2024

Root graded groups of type $H_{3}$ and $H_{4}$

Lennart Berg, Torben Wiedemann

Using the well-known realisation of the root system $H_{4}$ as a folding of $E_{8}$ , one can construct examples of $H_{4}$ -graded groups from Chevalley groups of type $E_{8}$ . Such…

math.GR2024

Root Graded Groups

Torben Wiedemann

We define and study root graded groups, that is, groups graded by finite root systems. This notion generalises several existing concepts in the literature, including in particular…

Root graded groups of type H3​ and H4​

Root Graded Groups

Root graded groups of type $H_{3}$ and $H_{4}$