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One of Srinivasa Ramanujan’s Neglected Manuscripts Has Helped Solve Long-standing Mathematical Mysteries

Mathematician Ken Ono has solved long-standing puzzles using insights hidden in the unpublished papers of Indian prodigy Srinivasa Ramanujan

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On a Saturday morning in 1984, when Ken Ono was in high school, he opened his family's mailbox in Baltimore and found an envelope as thin as rice paper covered in brilliantly colored stamps. It was addressed to his father, a reserved Japanese mathematician. When Ono handed over the mail, the elder Ono looked up from the yellow legal pad on which he was always scribbling equations and set down his ballpoint pen. Gently, he pried open the seal and unfolded the letter inside.

“Dear Sir,” it began. “I understand … that you have contributed for the sculpture in memory of my late husband…. I am happy over this event.” It was signed “S. Janaki Ammal,” whom the red-inked letterhead identified as the widow of the “(Late) Srinivasa Ramanujan (Mathematical Genius).”

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