Why are we allowed to multiply a 1x1 matrix by any matrix?
1906
Multiplying by a $1\times 1$ matrix?
123183
Multiply each element in a vector by itself to create a matrix
102595
Number of ones in Binary matrix multiplication
4923
Why don't we study algebraic objects with more than two operations?
68055
Why are Vandermonde matrices invertible?
114271
Why is a matrix invertible if it can be written as the product of elementary matrices?
49409
Are all of the following statements equivalent? (vectors and matrices)
34913
Why does basic algebra provide one value for $x$ when there should be two?
44333
Why do elementary matrix operations not affect the row space of a given matrix?
157570
is a one-by-one-matrix just a number (scalar)?
136640
Can you completely permute the elements of a matrix by applying permutation matrices?
2482
Matrix Multiplication in context of row and column vectors
34372
Are $10\times 10$ matrices spanned by powers of a single matrix?
84626
Why in these matrices are $AB=BA$ not equal? What is the logic behind them?
56312
Why can this product of rectangular matrices not be the identity matrix?
148667
Perform matrix operations (addition, product, transpose, etc.) in LaTeX?
141456
Why is it important that a basis be orthonormal?