discretize.utils.inv3X3BlockDiagonal

discretize.utils.inv3X3BlockDiagonal(a11, a12, a13, a21, a22, a23, a31, a32, a33)[source]

inverts a stack of 3x3 matrices

Input:
A - a11, a12, a13, a21, a22, a23, a31, a32, a33
Output:
B - inverse