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A Gordon-Litherland form for ribbon surfaces

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HTLW02 - 3-manifold workshop

Co-authors: Josh Greene and Saso Strle

I will describe work in progress aimed at generalising the Gordon-Litherland form to the case of properly embedded surfaces in the four-ball and the four-sphere.  I will also discuss a motivating non-application involving concordance invariants of links which lie on definite surfaces in S^4.

This talk is part of the Isaac Newton Institute Seminar Series series.

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