This leads us to another contribution of Leonhard Euler to graph theory, namely Euler's polyhedron theorem or simply Euler's formula.
这是我们引向l·尤拉对图论的另一个贡献,即尤拉多面体定理,或简称尤拉公式。
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According to Euler's rotation theorem, the Euler's eigenaxis rotation provides the shortest angular path from a initial orientation to the desirable orientation.