It s not more important! And most of these theorems can be extended to non square matrix anyway. Projections are examples of Rn to Rm applications that are very

It s not more important! And most of these theorems can be extended to non square matrix anyway. Projections are examples of Rn to Rm applications that are very importants. Coordinates or probability measures too. And it make little sense to try to reduce them to endomorphism. Matrix can represent applications but they are objects worth studying for what they are.