Tensors Magnetic shielding Molecular dynamics Nuclear magnetic resonance Approximation theory Born-Oppenheimer Density functional theory Douglas-Kroll-Hess approximation Elimination of the small component (ESC) Hamiltonians Heavy elements Linear response Linear response (LR) Magnetic properties Mathematical operators Molecular Hamiltonian Molecular magnetic properties Molecular rotations Nuclear magnetic shieldings Perturbation techniques Perturbative expansion Probability density function Quasirelativistic approach Relativistic effect Relativistic effects Relativistic electron Small components Spectral parameters Spin-rotations Stereochemistry