Hi all, I have a partial differential equation in spherical coordinates of the complex function Psi(theta,phi). So one will need a mesh which is spherical manifold. Can I use dealii to design the periodic boundary conditions in the phi angle such that my complex function Psi is periodic in 4*Pi not 2*Pi ? I want it to reverse sign every rotation by 2*Pi. This is sometimes a normal situation in quantum mechanics. One can imagine this as follows: as you rotate one complete cycle in phi direction on the outer sphere, you arrive at the same point but on the inner surface of the sphere, with an opposite sign. Another complete cycle on the inner surface, and you arrive at the same point on the outer surface with the original sign.
Another question: Can I have a new operator in the differential equation which reverses the sign of one coordinate? For example: D Psi(theta , phi)= Psi(theta , -phi) Thanks Tarek
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