Hello,

and are two column p-vectors

is a square matrix.

Trying to proof something (see attachment) ... I had to force it a bit and even though it feels right, I do not know exactly how to apply commutative law on the following products so that they can cancel out with the division I might be wrong but I think they both produce the same square matrix though looking at the original problem looks more like a scalar.

Basically I need to arrive to or .

I was trying something along the lines of but I can't arrive to the desired result.

Maybe I am applying the commutative rules wrongly ... btw I don't remember the rules name for this otherwise I would just look it up ..

If they did cancel the output would be 1 or Identity_p?

TIA,

Best regards,

bravegag

This is the proof I am trying to make: