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Homotopy motions of surfaces in $3$-manifolds

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arxiv 2011.05766 v4 pith:PMIGRF4D submitted 2020-11-11 math.GT

classification math.GT
keywords homotopymanifoldheegaardmanifoldsmotionssurfacesurfacesarises
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We introduce the concept of a homotopy motion of a subset in a manifold, and give a systematic study of homotopy motions of surfaces in closed orientable 3-manifolds. This notion arises from various natural problems in 3-manifold theory such as domination of manifold pairs, homotopical behavior of simple loops on a Heegaard surface, and monodromies of virtual branched covering surface bundles associated to a Heegaard splitting.

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