Intuition and name for $a^T R a$
50558
What is the name of the operation $v^T H v$?
101861
How do you prove that $tr(B^{T} A )$ is a inner product?
152665
$A^TA+I$ is always invertible?
27821
A problem on rank of $A$ and $\operatorname{adj}(A)$
27738
Gradient of $a^T X b$ with respect to $X$
144097
eigenvalues and eigenvectors of $vv^T$
108642
$e^A$, where $A= \begin{bmatrix} 0 & \omega \\ -\omega& 0 \end{bmatrix}$
102717
Real analysis of powers
94077
Proof of linear independence of $e^{at}$
11557
How to prove $\det(e^A) = e^{\operatorname{tr}(A)}$?
156438
Find a matrix equation equivalent to $A^TPA+P=I$
71977
Give an example of a relation R on $A^2$ which is reflexive, symmetric, and not transitive
18670
What is the gradient of $x^T A\, x$ with respect to the matrix $A$?
78307
Under what conditions is $AA^T$ invertible?
77891
$(U\circ T)^{*} = T^{*}\circ U^{*}$
41648
The Intuition behind l'Hopitals Rule
147627
Relation between condition numbers $\kappa(A^T A)$ and $\kappa(A)$