lean_workbook_plus_73126

⚠️ Retired — specification defect

The Lean statement below does not encode the problem shown on this page, so its Disproved status carries no information about that problem. Do not import this node or use it as a dependency.

Dividing the latter by $abc$ , it leads to $\frac 1 3 = \frac 1 {ab} + \frac 1 {bc} + \frac 1 {ca}$ .

Why this node was retired

The posted statement is

theorem lean_workbook_plus_73126 : ∀ a b c : ℝ, a > 0 ∧ b > 0 ∧ c > 0 → a * b * c = 3 → 1 / 3 = 1 / (a * b) + 1 / (b * c) + 1 / (c * a)   :=  by sorry

The posted abc=3 hypothesis is a different equation.

The recorded counterexample refutes the statement as encoded. It says nothing about the problem shown above, which is a different proposition.

Proposed corrected statement

Use the source’s preceding relation abc=3(a+b+c), with nonzero variables, which yields the displayed reciprocal identity on division by abc.

Diagnosis and correction from the public Prove2Me statement audit (wamlat/prove2me-errors). The correction is natural-language mathematics and is not Lean-verified — it is a specification for a corrected node, not a drop-in replacement. No corrected replacement node exists yet.