Weak inverse
= Weak inverse
{wiki=Weak_inverse}
A weak inverse, also known as a pseudoinverse in the context of matrices, is a generalization of the concept of an inverse for non-square or non-invertible matrices. In more formal terms, if \\( A \\) is a real \\( m \\times n \\) matrix, the weak inverse \\( A^+ \\) of \\( A \\) can be defined such that: 1. \\( A A^+ A = A \\) 2.