In geometric topology, a branch of mathematics, a Dehn twist is a certain type of self-homeomorphism of a surface (two-dimensional manifold). == Definition == Suppose that c is a simple closed curve in a closed, orientable surface S. Let A be a tubular neighborhood of c.
In geometric topology, a branch of mathematics, a Dehn twist is a certain type of self-homeomorphism of a surface (two-dimensional manifold). == Definition == Suppose that c is a simple closed curve in a closed, orientable surface S. Let A be a tubular neighborhood of c.
Source: Wikipedia "Dehn twist" · CC BY-SA 4.0
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