English
Lift a SMulPosStrictMono structure along a map preserving smul; the resulting β is strictly monotone under positive scalars.
Русский
Переносим SMulPosStrictMono вдоль отображения, сохраняющего умножение; β строго монотонно по положительным скалярам.
LaTeX
$$$\text{SMulPosStrictMono α β}$ via lift$$
Lean4
theorem lift [SMulPosStrictMono α γ] (hf : ∀ {b₁ b₂}, f b₁ ≤ f b₂ ↔ b₁ ≤ b₂) (smul : ∀ (a : α) b, f (a • b) = a • f b)
(zero : f 0 = 0) : SMulPosStrictMono α β where
smul_lt_smul_of_pos_right b hb a₁ a₂
ha := by
simp only [← lt_iff_lt_of_le_iff_le' hf hf, zero, smul] at *
exact smul_lt_smul_of_pos_right ha hb