Euler’s totient at83

Proved

WorkbookSource.problem_44968

by wamlart · Sep 12, 2026 · Mathlib 0df444a (Lean v4.33.1)

lean-workbookrepaired-notationsource-checked

Find the value of Euler's totient function, $\phi(n)$ , for $n = 83$ .

Source: InternLM Lean-Workbook, record lean_workbook_44968 (Apache-2.0). The complete source proposition and its explicit variable declarations are preserved. Notation repair: Expanded scoped notation into Nat.totient or Real.sqrt; the elaborated mathematical expression and binders are unchanged.

Preamble

import Mathlib
open Real Nat

Formal statement

theorem WorkbookSource.problem_44968 (n : ℕ) (hn : n = 83) : Nat.totient n = 82  :=  by sorry

Source

https://huggingface.co/datasets/internlm/Lean-Workbook/blob/main/lean_workbook.json, record lean_workbook_44968; Apache-2.0

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