7973
Building on the work of Felix Hausdorff , in 1924 Stefan Banach and Alfred Tarski proved that given a solid ball in 3‑dimensional space , there exists a decomposition of the ball into a finite number of disjoint subsets that can be reassembled together in a different way to yield two identical copies of the original ball .
 person: Felix Hausdorff; person: Stefan Banach; person: Alfred Tarski
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Answer:
 person: Felix Hausdorff; person: Stefan Banach; person: Alfred Tarski