Source authenticated
Kourovka Problem 21.147 - Relatively Convex Subgroups
Must the right-relatively convex subgroups of a right-orderable nonabelian group form a sublattice of its subgroup lattice? A construction shows they need not.
Exact FrontierDelta
Prior state unknown→disproved
Scope and record
Occurred: Jul 20, 2026
Delta type: SOURCE CLAIM
Assumptions: VibeMathed verification: lean-verified. Publication: preprint. AI contribution: ai-discovered. Imported under CC BY 4.0.
Canonical aliases: Kourovka Problem 21.147 - Relatively Convex Subgroups · Kourovka 21.147
Confidence: Not scored
Registry verification: lean verified · preprint · resolved
Lineage and corrections
This event attributed to Aristotle