Pontryagin product

例句：

1. 1. The Pontryagin product is a mathematical concept that has been used in various fields of science and engineering.
   庞特里亚金产品是一个数学概念，已经在科学和工程的各个领域中使用。
2. 2. The Pontryagin product is a measure of the amount of information contained in a system.
   庞特里亚金产品是系统包含的信息量的度量。
3. 3. The Pontryagin product is used to optimize the performance of a system by finding the best combinationof inputs.
   庞特里亚金产品用于通过找到输入的最佳组合来优化系统的性能。