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Source labels openChecked July 26, 2026

WikipediaGroup theory

Leinster Groups

Conjecture:* Are there infinitely many Leinster groups?

Mathematical statement

Conjecture:* Are there infinitely many Leinster groups?

This asks whether there exist infinitely many (non-isomorphic) finite groups that are Leinster groups.

Formalized via the negation of "Does there exist an n such that all Leinster groups have order less than n".

Statement source: Wikipedia statement material

Statement terms: CC-BY-SA-4.0

Attributed source material. Reuse must follow the linked attribution and share-alike terms.

Statement artifacts, not proofs

These records expose exact Lean propositions and statement-only wrappers. Defining a proposition does not supply a proof of it. A placeholder-bearing target also contains no proof. Elaboration checks syntax and types; it does not certify that a formalization perfectly captures every nuance of the informal problem.

Pinned Lean formulation 1

infinitely_many_leinster_groups

Canonical source
Complete statement target, proof intentionally absentLean 4
theorem infinitely_many_leinster_groups : answer(sorry)     ¬∃ n : ,  G : Type,  (_ : Group G) (_ : Fintype G),      IsLeinster G  Fintype.card G < n := by  sorry
Statement source
Formal Conjectures
Lean version
v4.27.0
Placeholder
Present; no proof artifact
Source evidence
Pinned source index
Fidelity review
Community formulation

References