1. The document demonstrates that the set of matrices M(m,n) forms a vector space. It checks various properties including:
2. Closure under addition: The sum of two m x n matrices results in another m x n matrix.
3. Associativity and commutativity of addition hold for matrix addition similarly to real number addition.
4. Closure under scalar multiplication: Scalar multiplication of a matrix results in another matrix of the same size, with the scalar multiplied to each element.