discretize.utils.inverse_3x3_block_diagonal

discretize.utils.inverse_3x3_block_diagonal(a11, a12, a13, a21, a22, a23, a31, a32, a33)

inverts a stack of 3x3 matrices

Input:

A - a11, a12, a13, a21, a22, a23, a31, a32, a33

Output:

B - inverse