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- W1556556489 abstract "We obtain a geometric realization of a minimal 8-vertex triangulation of the dunce hat in Euclidean 3-space. We show there is a simplicial 3-ball with 8 vertices that is collapsible, but also collapses onto the dunce hat, which is not collapsible. This 3-ball is as small as possible, because all triangulated 3-balls with fewer vertices are extendably collapsible. As we will see, the Alexander dual of the dunce hat is collapsible." @default.
- W1556556489 created "2016-06-24" @default.
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- W1556556489 date "2009-12-18" @default.
- W1556556489 modified "2023-09-27" @default.
- W1556556489 title "The dunce hat in a minimal non-extendably collapsible 3-ball" @default.
- W1556556489 hasPublicationYear "2009" @default.
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