Книга: Renormalization Group: Euclid, Ernst Stueckelberg, Renormalization, Nanotechnology, Quantum Field Theory, Solid-State Physics, Quantum Electrodynamics, Critical Phenomena

High Quality Content by WIKIPEDIA articles! In theoretical physics, renormalization group (RG) refers to a mathematical apparatus that allows one to investigate the changes of a physical system as one views it at different distance scales. In particle physics it reflects the changes in the underlying force laws as one varies the energy scale at which physical processes occur. A change in scale is called a 'scale transformation' or 'conformal transformation.' The renormalization group is intimately related to 'conformal invariance' or 'scale invariance,' a symmetry by which the system appears the same at all scales (so-called self-similarity).