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Ivancevic_Applied-Diff-Geom

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128 <strong>Applied</strong> <strong>Diff</strong>erential <strong>Geom</strong>etry: A Modern Introduction2.3.10 Application: Natural <strong>Geom</strong>etrical StructuresClosely related to the higher–dimensional automata are various natural geometricalstructures, most of which are commonly called tangles.For example, a 2D flow–chart–like complex 1D−structure could be adiagram of the form [Leinster (2002); Leinster (2003)]:Its 3D–generalization is a surface diagram with the same information–flow:Moreover, if we allow crossings, as in a braid:then we start getting pictures that look like knots which are again related

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