A geometric interpretation of Milnor's triple linking numbers.
The nonuniqueness of Chekanov polynomials of Legendrian knots.
On 4-Manifolds with Singular Torus Actions.
Dedekind sums, ..-invariants and the signature cocycle.
Slice Knots and Property R.
The 3-manifold invariants of Witten and Reshetikhin-Turaev for sl (2, C).
The Smale invariant of a knot.
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