The Alternating Sign Matrix Conjecture in combinatorics was discovered (by researchers in the National Security Agency, so we don't know the motivation) in the late 1970s, but not proved for nearly 20 years. There is a wonderful book about it: Proofs and Confirmations, by David Bressoud.
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The Alternating Sign Matrix Conjecture in combinatorics was discovered (by researchers in the National Security Agency, so we don't know the motivation) in the late 1970s, but not proved for nearly 20 years. There is a wonderful book about it: Proofs and Confirmations, by David Bressoud. |
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