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We don't know whether every knot can be told apart from every other knot using a simple, efficient test.

open Global / Unspecified, Global WS01239
Mathematicians have many tools for distinguishing knots, but no single method works perfectly and efficiently for every possible case. This unsolved problem sits at the heart of the mathematical field of knot theory.
Created at: 2026-07-19T16:18:35Z
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WS01239 | World Solve | https://worldsolve.org/index.php?view=problem&id=1239

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