Is the MSE of a vector a scalar or a matrix?
2898
What's the MSE of $\hat{Y}$ in ordinary least squares using bias-variance decomposition?
99685
Matrix exponential for Jordan canonical form
139534
Derivative of determinant, which is correct?
19244
Covariance of a random vector after a linear transformation
84530
Size of Mean Squared Error (MSE)
127620
Matrix exponential of a traceless $2\times2$ complex matrix
152932
Proof: $\det\pmatrix{\langle v_i , v_j \rangle}\neq0$ $\iff \{v_1,\dots,v_n\}~\text{l.i.}$
75855
Show that $\det{(A + sxy^*)}$ is linear in $s$
6267
Matrices: system that is "computationally singular" versus "exactly singular"
74693
difference between linear transformation and its matrix representation .
1770
Matrix $M_1 = M(f', \mathcal{B}, \mathcal{B '})$ of $f$
81227
Matrix equation (esp. row vectors)
30720
If the dot product between two vectors is $0$, are the two linearly independent?
101452
How is the determinant related to the inverse of matrix?
149086
Determining $\mbox{tr}(A)$ and $\det(A)$ as functions of the eigenvalues of a matrix
76904
Computing matrix-vector calculus derivatives
89729
If $X$ is a singular matrix, then is $X'X$ singular?