Tags » Knot Theory
A few days ago, two people named Joshua (one Howie and one Greene) independently posted to arXiv a similar solution to an old question of Ralph Fox: 337 more words
University of Oxford Mathematical Institute
“Vortices do amazing things. They dance, they tie themselves in knots, they challenge mathematicians to explain them. In this case Étienne Ghys, CNRS Directeur de Recherche at the École Normale Supérieure de Lyon takes on the task of explaining. 34 more words
A few days ago, my co-blogger Nathan Dunfield posted a counterexample to the Strong Neuwirth Conjecture.
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N. Dunfield, A knot without a nonorientable essential spanning surface, …