The classical Green's function associated to a simply connected domain in the complex plane is easily expressed in terms of a Riemann mapping function.

A method is outlined for the determination of the Green's function associated with any partial differential equation for arbitrary domains. The Green's function is obtained as the solution of an ...

Nonequilibrium Green's functions (NEGF) have emerged as a pivotal theoretical framework for investigating the time-dependent behaviour of quantum many-body systems.