GREEN FUNCTION FUNCION DE GREEN 13 AUTOENERGIAS 3 DYSON EQUATION 3 ECUACION DE DYSON 3 ENERGIAS DE EXITACION 3 ESPACIO DE LIOUVILLE 3 EXCITATION 3 EXITATION ENERGIES 3 LIOUVILLE-SPACE 3 POLARIZATION PROPAGATOR 3 PROPAGADOR DE POLARIZACION 3 SELF-ENERGIES 3 WAVE FUNCTIONS 3 ATOMIC BEAM DIFFRACTION 2 BOGOLYJBOV TRANSFORMATION 2 BOUNDARY CONDITIONS 2 CONGLOMERATES 2 COSMOLOGY 2 COUPLING CONSTANTS 2 CREATION OPERATORS 2 CRYSTAL-PHASE TRANSFORMATIONS 2 DEMAGNETIZATION 2 DESMAGNETIZACION 2 DISLOCATIONS 2 ELECTROMAGNETIC TRANSITIONS 2 EQUIVALENCE PRINCIPLE 2 EXCITACIÓN 2 FERMIONES 2 FERMIONS 2