The Toulouse–Kleman homotopic classification of topological defects in ordered systems illustrated by experiments by Pieranski, Pawel, Godinho, Maria Helena

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Towards Noncommutative Linking Numbers via the Seiberg-Witten Map by H. García-Compeán, O. Obregón, R. Santos-Silva

“…In the abelian Chern-Simons theory on a three-dimensional manifold, it is shown that the effect of noncommutativity is the appearance of 6n new knots at the nth order of the Seiberg-Witten expansion. …”
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