World Bank economist Kaushik Basu has found another new and longer method to prove what Pythagoras proved 2600 years ago - that in a right angle triangle, the sum of the square of two sides equals the square of the hypotenuse.
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"I treat this as my hobby. I do it for fun", says Basu. To justify the new and longer proof, he invokes the Greek poem Ithaca, which describes the long journey to Odysseus' home island. The island, the poet Cavafy says, is disappointing, but Ithaca's charm is in the journey itself.
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