1·It is proved that the Fermat Grand Theorem is tenable in the first case.
证明了费尔马大定理第一情形成立。
2·After comparison with the two modular inverse algorithms, we selected the extended Fermat method from the perspective of improving performance.
对比了两种模逆算法，从提高性能的角度选取了扩展的费尔马方法。
1·The paper is to prove the refraction on two kinds of medium interfaces of electric displacement line using the boundary condition of the electric field and Fermat Principle.
利用电场边界条件和费马原理证明电位移线在两种介质界面上的折射。