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Let $V$ and $V'$ be vector spaces over division rings. Suppose $\dim V$ isfinite and not less than 3. Consider a mapping $l:V\to V$ with the followingproperty: for every $u\in {\rm GL}(V)$ there is $u'\in {\rm GL}(V')$ such that$lu=u'l$. Our first result states that $l$ is a strong semilinear embedding if$l|_{V\setminus{0}}$ is non-constant and the dimension of the subspace of $V'$spanned by $l(V)$ is not greater than $n$. We present examples showing thatthese conditions can not be omitted. In some special cases, this statement canbe obtained from Dicks and Hartley (1991) and Zha (1996). Denote by ${\mathcalP}(V)$ the projective space associated with $V$ and consider the mapping$f:{\mathcal P}(V)\to {\mathcal P}(V')$ with the following property: for every$h\in {\rm PGL}(V)$ there is $h'\in {\rm PGL}(V')$ such that $fh=h'f$. By thesecond result, $f$ is induced by a strong semilinear embedding of $V$ in $V'$if $f$ is non-constant and its image is contained in a subspace of $V'$ whosedimension is not greater than $n$, we also require that $R'$ is a field.

Characterizations of strong semilinear embeddings in terms of general linear and projective linear groups