What is the explanation of taking $dx$ to right hand side if $\frac{d}{dx}$ is an operator?
7474
What am I doing when I separate the variables of a differential equation?
59021
What is the most general expression for the coordinate representation of momentum operator?
116751
Question about Fredholm operator
88926
Why do we use operators in quantum mechanics?
137614
$\left|\frac{x}{|x|}-\frac{y}{|y|}\right|\leq |x-y|$, for $|x|, |y|\geq 1$?
49984
Valid justification for algebraic manipulation of $\mathrm{d}y/\mathrm{d}x$?
28719
Question about Angle-Preserving Operators
31979
Notation: Why write the differential first?
155177
How do you write a differential operator as a matrix?
60990
Tricky operator identity: $[L^2,[L^2,\vec{r}]]=2 \hbar ^2 \{ L^2, \vec{r}\}$?
49633
Hermitian conjugate of differential operator
90325
Why use the derivative and not the symmetric derivative?
138784
Is the differentiation operator an open mapping?
151347
Why do operators belonging to different Hilbert spaces commute?
33278
$\delta$ differential notation
26417
Why do we use Hermitian operators in QM?
119684
Is a contraction idempotent operator self-adjoint?