Applications of Quantum and Classical Connections in Modeling Atomic‎,‎ Molecular and Electrodynamical Systems is a reference on the new field of relativistic optics‎,‎ examining topics related to relativistic interactions between very intense laser beams and particles‎.‎ Based on 30 years of research‎,‎ this unique book connects the properties of quantum equations to corresponding classical equations used to calculate the energetic values and the symmetry properties of atomic‎,‎ molecular and electrodynamical systems‎.‎ In addition‎,‎ it examines applications for these methods‎,‎ and for the calculation of properties of high harmonics in interactions between very intense electromagnetic fields and electrons‎.‎ This resource is the only one of its kind‎,‎ a valuable tool for scientists and graduate students interested in the foundations of quantum mechanics‎,‎ as well as applied scientists interested in accurate atomic and molecular models‎.‎