Edgar Dewdney | Alexander Dewdney | Selwyn Dewdney | Westminster-Dewdney | Christopher Dewdney |
In 1989, A. K. Dewdney published a letter from his friend Arlo Lipof in the Computer Recreations column of the Scientific American where he describes an underground operation "in a South American country" of doubling gold balls using the Banach–Tarski paradox.