Abstract
The purpose of this paper is to show that over an infinite field of odd characteristic, invariants of G2 and Spin(7), both acting on several copies of octonions, are generated by the same invariants of degree at most 4 as in the case of a field of characteristic zero.
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ZUBKOV, A.N., SHESTAKOV, I.P. INVARIANTS OF G2 AND Spin(7) IN POSITIVE CHARACTERISTIC. Transformation Groups 23, 555–588 (2018). https://doi.org/10.1007/s00031-017-9435-8
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DOI: https://doi.org/10.1007/s00031-017-9435-8