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Theorems · Theorem · combinatorics

List.foldr_flip_eq_foldl

∀ {α : Type u_1} {β : Type u_2} {l : List α} {v : β → α → β} {b : β} [RightCommutative v],
  List.foldr (flip v) b l = List.foldl v b l

Second Bird–Wadler duality theorem.

Defined in
Mathlib.Data.List.Fold
Cited by
1 results in Mathlib
Foundations
Depth 9 from the axioms · uses propext
Assumes
RightCommutative
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Around this declaration

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List.foldl_eq_foldr' · cited by 0List.foldl_eq_foldr'RightCommutative · cited by 17RightCommutativeList.foldl_cons_eq_apply_foldl · cited by 4List.foldl_cons_eq_apply_…List.foldr_flip_eq_foldlCITED BYCITES

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