span_sum — Mathlib

English

SwapTrue applied to the term is always true.

Русский

SwapTrue применяемый к терму равен always true.

LaTeX

$$$\\mathrm{SwapTrue}(o, x)(\\mathrm{term} \\ I ho) = \\mathrm{true}$$$

Lean4

theorem span_sum :
    Set.range (eval C) =
      Set.range
        (Sum.elim (fun (l : GoodProducts (π C (ord I · < o))) ↦ Products.eval C l.1)
          (fun (l : MaxProducts C ho) ↦ Products.eval C l.1)) :=
  by rw [← sum_equiv_comp_eval_eq_elim C hsC ho, Equiv.toFun_as_coe, EquivLike.range_comp (e := sum_equiv C hsC ho)]

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