Computational methods Tensors article Magnetic susceptibility Quantum theory Genetic algorithms Molecules Nuclear magnetic shielding Current density Molecular dynamics Polarization Magnetic shielding Atoms Magnetic fields Perturbation techniques Silicon clusters Approximation theory Probability density function Algorithms Benzene Convergence of numerical methods Diamagnetism Electronic wave functions Global optimization Hypermagnetizability Lorentz force Magnetic field effects Magnetization Silicon Tensor components