papalex on Nostr: I had a few minutes. If there are no sign mistakes on my side (so don't trust me ...
I had a few minutes. If there are no sign mistakes on my side (so don't trust me here) then this is a much simpler counter example: \[x=e_1\otimes1 + e_2\otimes i\] \[y=e_1\otimes1 + e_3\otimes i\]