English
With SMul and IsScalarTower, c • sSup s = ⨆ a ∈ s, c • a.
Русский
При SMul и IsScalarTower, c • sSup s = ⨆ a ∈ s, c • a.
LaTeX
$$$ \text{[SMul } R \ ENat] \rightarrow [IsScalarTower R ENat ENat] \rightarrow c \cdot sSup s = \iSup_{a \in s} (c \cdot a) $$$
Lean4
theorem smul_sSup {R} [SMul R ℕ∞] [IsScalarTower R ℕ∞ ℕ∞] (s : Set ℕ∞) (c : R) : c • sSup s = ⨆ a ∈ s, c • a := by
simp_rw [sSup_eq_iSup, smul_iSup]