Properties of Elements# IsSemisimple(x): GrpLieElt -> BoolElt# Return true if, and only if, the element \(x\) of the group of Lie type is semisimple. IsUnipotent(x): GrpLieElt -> BoolElt# Return true if, and only if, the element \(x\) of the group of Lie type is unipotent. IsCentral(x): GrpLieElt -> BoolElt# Return true if, and only if, the element \(x\) of the group of Lie type is in the centre of its parent group.