>>16701005
sounds like he understands it to me. what has he written here do you think is incorrect? fyi, the cross product isn't well-defined insofar that it's generalizable across all dimensions. (some) mathematicians prefer geometric algebra, and it honestly should be taught over the cross product. to wit: cross products don't exist in QED and are only used in classical electromagnetism. see e.g.
https://en.wikipedia.org/wiki/Exterior_algebra