matrix inverse的用法和样例：
例句
- The new algorithm is non-iterative, and it needs the FFT algorithm and the inverse of little-size matrices.
不需要迭代，不需要预条件处理，计算过程中主要采用快速傅里叶变换及小矩阵求逆，计算效率高。 - The property of symmetry can also be used to save a part of the computational effort required for matrix inversion or for a solution of equations.
对称的特性也可用来节省矩阵求逆中或求解方程中所需要的一部分计算量。
