English
The image of a Sublattice under a lattice homomorphism is a Sublattice of the codomain.
Русский
Образ подрешетки под гомоморфизмом решётки является подрешеткой кодом.
LaTeX
$$def map (f : LatticeHom α β) (L : Sublattice α) : Sublattice β$$
Lean4
/-- The image of a sublattice along a monoid homomorphism is a sublattice. -/
def map (f : LatticeHom α β) (L : Sublattice α) : Sublattice β
where
carrier := f '' L
supClosed' := L.supClosed.image f
infClosed' := L.infClosed.image f