A proof of the isometric embedding of a given two-metric in E^3 of class C^1. The method uses the theory of first order partial differential equations. The curvature of the metric plays no role in the proof.
(a, 1)f structures on product of spheres
An index upper bound for non-orientable minimal surfaces in the $n-$dimensional Euclidean space
A characterization of involutes and evolutes of a given curve in $\mathbb{E}^{n}$
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