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math.GT2024
Kink-equivalence of matrices, spanning surfaces, 4-manifolds, and quadratic forms
Hugh Howards, Thomas Kindred, W. Frank Moore +1
All checkerboard surfaces for a given knot in are related by isotopy and (geometric) ``kinking" and ``unkinking" moves, which change matrices representing the surfaces' Gordo…
math.GT2024
How essential is a spanning surface?
Thomas Kindred
We introduce new numerical invariants of a spanning surface , called the \emph{algebraic essence} and \emph{geometric essence} of , which measure how far is fr…