17.74 (2010)

Solved

Let $G$ be a finite simple group of Lie type defined over a field of characteristic $p$ whose Lie rank is at least three, and $V$ an absolutely irreducible $G$-module over a field of characteristic that does not divide $p$. It is true that the split extension of $V$ by $G$ must contain an element whose order is distinct from the order of any element of $G$? The case of $G = U_n(p^m)$ is of special interest.

Progress

Yes, it is true: for linear groups (A. V. Zavarnitsine, Siberian Math. J., 49 (2008), 246–256); for other classical groups (M. A. Grechkoseeva, J. Algebra, 339, no. 1 (2011), 304–319); for exceptional groups (M. A. Grechkoseeva, J. Algebra Appl., 14, no. 4 (2015), Article ID 1550056).

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