single — Mathlib

English

The composition made of a single block of size n is defined as single(n, h) with h > 0.

Русский

Композиция, состоящая из одного блока размера n, задаётся как single(n, h) при h > 0.

LaTeX

$$$ \\text{single}(n,h) \\text{ is the composition with blocks } [n]. $$$

Lean4

/-- The composition made of a single block of size `n`. -/
def single (n : ℕ) (h : 0 < n) : Composition n :=
  ⟨[n], by simp [h], by simp⟩

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