obstacle problems

• 障碍问题

obstacle problems的用法和样例：

例句

1. He is researching the reading problems of young school children.
   他正在研究年轻学生的阅读障碍问题。
2. Moreover, when the matrix involved in the two-sided obstacle problem is a symmetric and nondegenerate matrix, the sequence converges to a solution of the problem.
   并且，当矩阵为非退化对称矩阵时，该序列收敛到双边障碍问题的解。