From Spine I: P11 control, MB7b

Declarations: P11_capacity_monotone_bound

From the machine-checked spine in formal/ (Mathlib + spine imports). Not self-contained for Lean 4 Web — use the repo or a local lake build.

theorem P11_capacity_monotone_bound
    {Csens₁ Csens₂ Cact₁ Cact₂ : Int}
    (hs : Csens₁ ≤ Csens₂) (ha : Cact₁ ≤ Cact₂) :
    Csens₁ + Cact₁ ≤ Csens₂ + Cact₂ := by omega