Note that the inv function USES SPL nested lists to represent matrices, as there is no matrix type in SPL.
请注意，inv函数使用SPL嵌套列表来表示矩阵，因为SPL中没有矩阵类型。
2
Your goal is to be able to easily use this matrix inverse function in SPL code.
您的目标是能够在SPL代码中轻松使用这个矩阵求逆函数。
3
Feature models are widely used in the SPL requirements commonality and variability analysis phase to model all possible configurations of SPL member applications.