Commutators in Finite Simple Groups of Lie Type

By R. Gow. 2000

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Word maps, conjugacy classes, and a noncommutative Waring-type theorem (2009, background): “However, the behavior of C1C2 for classes Ci of regular semisimple elements outside split tori is much less understood (see Gow [11] for interesting partial information).”
The Ore conjecture (2010, background): “Gow [22] proved that the conjecture holds for the symplectic groups PSp2n(q) if q ≡ 1 mod 4, and in [23] proved that every semisimple element of a finite simple group of Lie type is a commutator.”
Products of conjugacy classes and fixed point spaces (2010, background): “By a result of Gow [21], we may assume that C3 consists of non-semisimple elements and so the Steinberg character vanishes on C3.”