What is the gradient of $\operatorname{trace}(XCP(XC)^T)$?
13020
Proof for the funky trace derivative : $d (\operatorname{trace} (ABA'C))$?
15197
Relation between trace and rank for projection matrices
125774
Derivative of $a^x$ from first principles
54099
What are the eigenvalues of $\operatorname{ad}x$?
140024
How to obtain the gradient in polar coordinates
31138
How to find a global minimum for $\frac{1}{2}x^tQx-b^tx$
62621
Expected value and variance of trace function
86635
Optimizing $(X_{n}+c)^{2}$ to show that $P(\overline{X}_{n}\geq \lambda) \leq E(X_{n}^{2})/(EX_{n}^{2}+ \lambda^{2})$
138784
Is the differentiation operator an open mapping?
133749
Trouble with gradient intuition
46265
Minimal polynomial of the operator $T:V\oplus W\to V\oplus W$
29318
Calculating gradient, how to do this?
130253
Differentiating $\mbox{tr} (ABA^TC)$ w.r.t. $A$
146812
Explicit construction for unitary extensions of completely positive and trace preserving (CPTP) maps?
79024
the derivation of E(X|X)
9350
Gradient of Sobolev function on level sets
35801
Traceless matrices and commutators