Banach–Tarski paradox

The Banach–Tarski paradox is a theorem in set-theoretic geometry stating that a solid ball in 3‑dimensional space can be decomposed into finitely many non-measurable pieces and reassembled into two identical copies of the original ball, highlighting counterintuitive consequences of the axiom of choice.

Referenced by (3)

Full triples — surface form annotated when it differs from this entity's canonical label.