Hi everyone,

I'm trying to rewrite an equation to be able to solve it as a linear problem. The equation is:

P_1 H H^{-1} X_1 = P_2 X_2,
where P_1 and P_2 are 3mx4 matrices, X_1 and X_2 are 4xn matrices and H is a 4x4 matrix.

I rewrote this equation to:
P_1 H X_1 = P_2 H X_2

Now I want to write this equation in the form:
A H = 0

Can anyone help me with this? How can I rearrange the formula to the above format?