Gradient of $x^T B^T B x - x^T B^T b - b^T Bx$
489
How to take the gradient of the quadratic form?
124459
$n^{th}$ derivative of a tetration function
34702
Show $|A + uv^T| = (1 + v^T A^{-1} u) |A|$
9924
Derivative of conjugate multivariate function
157923
RMSProp Squared Gradients
87186
Gradient descent of $f(w)=\frac12w^TAw-b^Tw$ viewed in the space of Eigenvectors of $A$
153290
$A^TA=B^TB$. Is $A=QB$ for some orthogonal $Q$?
3387
Derivative of $f(x)=|x|$
84385
Implicit differentiation
21553
Prove that $\nabla_{\mathrm X} \mbox{tr} (\mathrm A \mathrm X^{-1} \mathrm B) = - \mathrm X^{-\top} \mathrm A^\top \mathrm B^\top \mathrm X^{-\top}$
153355
Given $S \in B(Y^{*}, X^{*})$, does there exist $T\in B(X,Y)$ such that $S=T^{*}$?
65100
Derivative of the product of operators and Derivative of exponential
135941
Derivative of $|x|^\alpha$
84597
Derivative of $(1-x)^{-2}$
117076
Gradient of a function as the direction of steepest ascent/descent
77667
A and B is similar ⇒ $A^T$ is similar to $B^T$.
86623
Why is $B^TB+\lambda\Omega$ positive definite?