How is the derivative of an operator defined?
89057
How does one properly define the derivative of one operator-valued function?
49408
Proof of the derivative of ln(x)
103624
What is the Physical Meaning of Commutation of Two Operators?
28096
Finding the derivative of $x\uparrow\uparrow n$
43956
Differentiating $f(x)^{g(x)}$
59165
Derivative of a linear transformation.
151347
Why do operators belonging to different Hilbert spaces commute?
122341
Exponential of a Differential Operator
101550
How to change coordinates of a differential operator?
75216
What is the derivative of this?
144323
Differentiation of a function
119684
Is a contraction idempotent operator self-adjoint?
61144
Derivative of $x^{x^{\cdot^{\cdot}}}$?
123911
Why is the derivative of a vector orthogonal to the vector itself?
138784
Is the differentiation operator an open mapping?
105398
Physical intuition for higher order derivatives
59125
Why does this matrix give the derivative of a function?