English
Images under a closed embedding are strictly monotone on the preorder of irreducible closeds.
Русский
Образы подмножества через замкнутое вложение образуют строго монотонную зависимость в частичном порядке неразложимых замкнутых.
LaTeX
$$$ \text{StrictMono}( \operatorname{IrreducibleCloseds.map}(f) ) $$$
Lean4
/-- Taking images under a closed embedding is strictly monotone on the preorder of irreducible closeds.
-/
theorem map_strictMono {f : X → Y} (hf : IsClosedEmbedding f) :
StrictMono (IrreducibleCloseds.map hf.continuous hf.isClosedMap) := fun ⦃_ _⦄ UltV ↦
hf.injective.image_strictMono UltV