...what exactly is missing? Okay, the paragraph about projective spaces and degrees of freedom is a bit of mystery to me, but the actual concept seems to be si

...what exactly is missing? Okay, the paragraph about projective spaces and degrees of freedom is a bit of mystery to me, but the actual concept seems to be simple enough. Should every article utilizing matrix multiplications to describe linear mappings spend time rephrasing https://en.wikipedia.org/wiki/Matrix_%28mathematics%29 https://en.wikipedia.org/wiki/Matrix_%28mathematics%29 i.e. a basic linear algebra course?