ZipK writes: The co-creator (together with his wife, Sylvia) of Thunderbirds, Fireball XL-5, Stingray, Supercar, Space: 1999 and other unique science-fiction shows has passed away at the age of 83. FAB.
We warn the reader in advance that the proof presented here depends on a
clever but highly unmotivated trick.
-- Howard Anton, "Elementary Linear Algebra"