Execute the term $P=A(A^TA)^{-1}A^T$
131680
Writing projection in terms of projection matrix
75009
$A = \bigcap_{\mathfrak{p} \in \text{Spec(A)}} A_{\mathfrak{p}} = \bigcap_{\mathfrak{m} \in \text{MaxSpec(A)}} A_{\mathfrak{m}}$
55094
How to show $i^{-1} = -i$?
152665
$A^TA+I$ is always invertible?
97984
Express as sum of powers
48956
Simplify $\arctan (\frac{1}{2}\tan (2A)) + \arctan (\cot (A)) + \arctan (\cot ^{3}(A)) $
58741
Operator Exponential $e^A e^B = e^{A+B}$
128355
Does $e^{tx} + x = t - 1$ yield a solution/s to $\frac{dx}{dt} = \frac{e^{-tx} - x}{e^{-tx} + t}$?
61274
If $AA^T$ is the zero matrix, then $A$ is the zero matrix
102234
Show $a^p \equiv a \mod 2p$
32511
How do I evaluate only one step of an expression?
143765
To Show that $\exp(tX)\exp(tY)= \exp(t(X+Y)) + (1/2)t^2[X, Y] +o(t^3)$
124827
Show that $Y\sim N(a+A\mu,AVA^T)$
109674
If $(I-T)^{-1}$ exists, can it always be written in a series representation?
87713
How to propagate uncertainty to $\tan(x)$?
108642
$e^A$, where $A= \begin{bmatrix} 0 & \omega \\ -\omega& 0 \end{bmatrix}$
80015
$Tr(A^2)=Tr(A^3)=Tr(A^4)$ then find $Tr(A)$