Functions and mappings | Smooth manifolds | Differential geometry

Diffeology

In mathematics, a diffeology on a set generalizes the concept of smooth charts in a differentiable manifold, declaring what the "smooth parametrizations" in the set are. The concept was first introduced by Jean-Marie Souriau in the 1980s under the name Espace différentiel and later developed by his students and . A related idea was introduced by (陳國才, Chen Guocai) in the 1970s, using convex sets instead of open sets for the domains of the plots. (Wikipedia).

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From playlist PHYSICS 61 DIFFRACTION OF LIGHT

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From playlist 38th Annual Geometric Topology Workshop (Online), June 15-17, 2021

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From playlist PHYSICS 61 DIFFRACTION OF LIGHT

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What is the difference between convex and concave polygons

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From playlist Classify Polygons

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