Unknotting information from 4-manifolds

Cochran, T. D.; Lickorish, W. B. R.

doi:10.1090/S0002-9947-1986-0849471-4

Unknotting information from -manifolds

Authors: T. D. Cochran and W. B. R. Lickorish
Journal: Trans. Amer. Math. Soc. 297 (1986), 125-142
MSC: Primary 57M25; Secondary 57M12, 57Q20, 57Q60
DOI: https://doi.org/10.1090/S0002-9947-1986-0849471-4
MathSciNet review: 849471
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Abstract: Results of S. K. Donaldson, and others, concerning the intersection forms of smooth -manifolds are used to give new information on the unknotting numbers of certain classical knots. This information is particularly sensitive to the signs of the knot crossings changed in an unknotting process.

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