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A Second Homotopy Group for Digital Images
Published 12 Oct 2023 in math.AT | (2310.08706v2)
Abstract: We define a second (higher) homotopy group for digital images. Namely, we construct a functor from digital images to abelian groups, which closely resembles the ordinary second homotopy group from algebraic topology. We illustrate that our approach can be effective by computing this (digital) second homotopy group for a digital 2-sphere.
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