# Relativistic magnetic interactions from non-orthogonal basis sets

# TODO

- Definition of magnetic entities:
    * Through simple sequence o forbitals in the unit cell
    * Through atom specification
    * Through atom and orbital specification
- Separation of TR and TRB components of the Hamiltonian, Identification of the exchange field.
- Definition of commutator expressions, old projection matrix elements
- Efficient calculation of Green's functions
- Calculation of energy and momentum resolved derivatives
- Parallel BZ and serial energy integral