Lowering operator for spherical harmonics
88813
SphericalHarmonicY does not seem to be an eigenfunction of the spherical harmonic equation
119352
compact and self adjoint square root of an operator
6888
How to implement Einstein summation convention with differential operators
71945
How to reduce circuit elements of a decomposed $C^2(U)$ operation?
148541
Quantization of a particle on a spherical surface
158876
Computing with matrix differential operators
92746
$\Delta \mathbf n = -2 \mathbf n$ on the Euclidean sphere
59632
Bessel's function in spectral geometry
36152
Bessel function representation of spacelike KG propagator
28719
Question about Angle-Preserving Operators
29304
Surface integral of a scalar over a unit cube.
59235
Finding eigenvalues of a differential operator
18321
Smoothness constraint of wave function
61542
conversion of laplacian from cartesian to spherical coordinates
81572
Reordering numerically calculated eigenvalues assuming smooth dependence on a parameter
16293
N-dimensional generalization of vector curl from elements of Jacobian
133609
orthonormal system in a Hilbert space