third isomorphism theorem

例句：

1. 1.The third isomorphism theorem is a fundamental principle in the study of group theory.
   第三同构定理是群论研究中的一个基本原理。
2. 2. This research is based on the third isomorphism theorem, which states that two groups are isomorphic if and only if they have the same number of elements.
   这项研究基于第三同构定理，该定理指出如果两个群具有相同的元素数量，则它们是同构的。
3. 3. The third isomorphism theorem has been proven to be true for all finite groups, not just those with small numbers of elements.
   第三同构定理已被证明对所有有限群都成立，而不仅仅是那些有小数量元素的群。