lean_workbook_plus_676

⚠️ 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.

Explain why it is not possible to define $0 \div 0$.

Why this node was retired

The posted statement is

theorem lean_workbook_plus_676 : ¬ (0 : ℝ) / 0 = 0   :=  by sorry

Explain nonuniqueness of solving0·q=0, or model division as a partial operation; do not assert a negation of Mathlib’s conventional total value0/0=0.

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

Proposed corrected statement

Explain nonuniqueness of solving0·q=0, or model division as a partial operation; do not assert a negation of Mathlib’s conventional total value0/0=0.

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.