The integer part of a difference of square roots

Proved

WorkbookSource.base_23817

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

lean-workbooksource-checked

Evaluate $\left\lfloor\! \sqrt{26} -\!\sqrt{8} \right\rfloor$

Source: InternLM Lean-Workbook, record lean_workbook_23817 (Apache-2.0). Complete source proposition preserved; proof developed independently.

Preamble

import Mathlib
open Real Nat

Formal statement

theorem WorkbookSource.base_23817 : ⌊√26 - √8⌋ = 2  :=  by sorry

Source