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Given a fibered knot $K\subseteq S^3$, does every genus-minimizing Seifert surface appear as the fiber of a bundle $S^3\setminus K\to S^1$?

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The answer is "yes". See Corollary 2 on page 119 of Thurston's article A norm for the homology of 3-manifolds.

In fact, fibered knots fibre in exactly one way. And all minimal genus Seifert surfaces (for a fixed fibered knot) are isotopic.


Since Thurston's paper is not immediately and obviously available online (?), I googled around and found A survey of the Thurston norm. See Example 2.4 therein.

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