# 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.