Computes Schur multipliers for locally isotropic Steinberg groups and root graded Steinberg groups of rank at least 3 (excluding H3 and H4), proving the former are well-defined as abstract groups.
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An explicit formula is given for squares of Weyl elements in isotropic reductive groups over commutative rings, with classification in rank one groups.
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Locally isotropic Steinberg groups II. Schur multipliers
Computes Schur multipliers for locally isotropic Steinberg groups and root graded Steinberg groups of rank at least 3 (excluding H3 and H4), proving the former are well-defined as abstract groups.
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Weyl elements in isotropic reductive groups
An explicit formula is given for squares of Weyl elements in isotropic reductive groups over commutative rings, with classification in rank one groups.