Composition.blocksFinEquiv

{n : ℕ} → (c : Composition n) → (i : Fin c.length) × Fin (c.blocksFun i) ≃ Fin n

Equivalence between the disjoint union of the blocks (each of them seen as Fin (c.blocksFun i)) with Fin n.

Defined in: Mathlib.Combinatorics.Enumerative.Composition
Cited by: 3 results in Mathlib
Foundations: Depth 65 from the axioms · uses propext, Classical.choice, Quot.sound

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