Let M be a 3-manifold. Let $S$ and $T$ be properly embedded surfaces in $M$ such that $[S] = [T] \in H_2(M, N(\partial S)) $. Is it true that we can isotope $\partial S$ so that it coincides with $\partial T$?
2026-04-03 19:36:54.1775245014
Homologous surfaces in three-manifolds
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