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The Final Braid Puzzle Solved | Science News
For nearly 100 years, mathematicians chased a brainteaser about braids—woven strands that hide deep mathematical secrets. Werner Burau’s 1930s question: Could translating braids into matrices lose information? became a decades-long obsession for Joan Birman, who turned her grandmother’s knitting into a lifelong quest. While braids with five or more strands were proven unfaithful, the four-strand case remained stubbornly unsolved. Now, at 99, Birman and her collaborators cracked it with a bold new geometric method, proving that complexity erodes uniqueness—and closing a century-old chapter in…
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