∀ (𝕜 : Type u_1) (E : Type u_4) [inst : SeminormedAddCommGroup E] [inst_1 : NontriviallyNormedField 𝕜]
  [inst_2 : NormedSpace 𝕜 E] {v v_1 : E} (e_v : v = v_1) (hv : ‖v‖ = 1),
  LinearIsometry.toSpanSingleton 𝕜 E hv = LinearIsometry.toSpanSingleton 𝕜 E ⋯