Why the radial delta function is not equal to the product of two 1D delta functions
55713
Dirac delta in polar coordinates
66433
Derivative of delta function
36826
Products of Differential Operators
92746
$\Delta \mathbf n = -2 \mathbf n$ on the Euclidean sphere
91359
Are these mixed partial derivatives equal?
18335
Fourier transform of a radial function
141937
Prove that the $\lim_{(x,y) \to (0,0)}h(x,y)$ Does not Exist using Polar Coordinates
151977
Dirac delta function as a limit of sinc function
98235
Justifying Gauss Law in 1D
155195
Contraction of Kronecker delta = 4
101888
Least action principle : is $ \delta \frac{dx}{dt} = \frac{d \delta x}{dt} $ always true?
18564
Why is the symmetry variation $\delta_s q$ different from the ordinary variation $\delta q$?
136692
Why should the spatial derivative order of the ODE *not* exceed two?
137569
Generalising a Dirac Delta function formula in General Relativity
79590
Riemann and Darboux Integral of a product of two functions
146699
Dirac Delta Function of a Function
53640
Equality of mixed partial derivatives