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Knots and Contact Geometry II: Connected Sums

John B. Etnyre, Ko Honda

math.SGarXiv:math/0205310

Abstract

We study the behavior of Legendrian and transverse knots under the operation of connected sums. As a consequence we show that there exist Legendrian knots that are not distinguished by any known invariant. Moreover, we classify Legendrian knots in some non-Legendrian simple knot types.

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