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Questions on the calculus of variations, which deals with the optimization of functionals mostly defined on infinite dimensional spaces.

5 votes

How can you compute the maximum volume of an envelope(used to enclose a letter)?

As the envelope is made of paper, a mathematical model of its deformation would be an isometric coordinate transformation and thus must have zero Gauss curvature almost everywhere; that restriction is …
Manfred Weis's user avatar
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