profess.System.add_generic_nonlocal_a_functional

System.add_generic_nonlocal_a_functional(a, b, f, fp, den0=- 1)

Add nonlocal kinetic energy functional of generic type A.

Parameters:

afloat

Exponent a.

bfloat

Exponent b.

ffunction

The function f(x).

fpfunction

The derivative f’(x).

den0float, optional

Uniform reference density. By default (whenever`den0`<0), uses the system-averaged electron density.

Returns:

systemprofess.System