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1 Demonstratio Mathematica

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Some remarks on origami and its limitations

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Maszczyk T. , Świrszcz G.

tom Vol. 41, nr 2

473-480

From a mathematical point of view the Japanese art of Origami is an art of finding isometric injections of subsets of R2 into R3. Objects obtained in this manner are developable surfaces and they are considered to be fully understood. Nevertheless, until now it was not known whether or not the local shape of the Origami model determines the maximum size and shape of the sheet of paper it can be madę of. In the present paper we show that it does. We construct a set [...] containing the point (O, 1/2) and an isometry [...]such that for every neighborhood [...] restricted to u cannot be extended to an isometry of the set [...] into R3. We also prove that all the singularities of an Origami model are of the same type - there can appear only cones.