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1·Sudoku's story begins in 1783 when Leonhard Euler, a Swiss 11 mathematician, invented Latin 12 Squares.

数独的故事开始于1783年，当时一名瑞士数学家里恩哈。优勒发明了“拉丁方块”。

2·He was compared to Leonhard Euler (1707-83), an awesome Swiss regarded as the most prolific mathematician who ever lived.

人们把他和欧拉(1707 - 83)，一个最多产的令人敬畏的瑞士数学家作比较。

3·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。