English
If the M-action is pretransitive, then the N-action obtained through a homomorphism f is also pretransitive.
Русский
Если M-действие предтранситивно, то через гомоморфизм f полученное N-действие также предтранситивно.
LaTeX
$$$\\text{MulAction.IsPretransitive.of_compHom } M N α f : \\text{IsPretransitive } N α$.$$
Lean4
@[to_additive]
theorem of_compHom {M N α : Type*} [Monoid M] [Monoid N] [MulAction N α] (f : M →* N)
[h :
letI := compHom α f;
IsPretransitive M α] :
IsPretransitive N α :=
letI := compHom α f;
h.of_smul_eq f rfl