aesoteric writes "Apple co-founder Steve Wozniak has voiced a renewed desire to see the company open its architecture to the masses, allowing savvy users to expand and add to their products at will. However, Wozniak qualified his desire for a more open Apple by arguing that openness should not impinge on the quality of the products themselves. He also sees any change of heart on openness as a challenge when Apple continues to rake in huge cash with its current model."
We warn the reader in advance that the proof presented here depends on a
clever but highly unmotivated trick.
-- Howard Anton, "Elementary Linear Algebra"