conatus.expert.ShellBasis

class conatus.expert.ShellBasis(coord, size, radii, dealias=REQUIRED)

Bases: _SphericalRadial

Spherical shell ri <= r <= ro (0 < ri): Chebyshev T_n(t), r = c + h t, for every spin component; equations in a declared r-multiplied form (each row times the smallest power of r that makes its coefficients polynomial, as Dedalus’s r^-k Jacobi(k-1/2, k-1/2) derivative bases).

Parameters:

• coord (Coordinate)

• size (int)

• radii (tuple[float, float])

• dealias (Any)

family = 'shell radial (Chebyshev T in t, r-multiplied operators)'

fft_length(M)

Length of the FFT that transforms an M-point grid (Fourier: M).

Parameters:

M (int)

Return type:

int

coeff_space()

Return type:

str