Journal of Physical Sciences Successes, 1986, t. 150, No. 1, s. 1712. Ernst Karl Gerlach Stckelberg (19051984) was one of the greatest theoretical physicists of the 20th century. Stckelberg was one of the first, if not the first, who was still in 1934-1935. began to understand and tried to promote the ideas that later formed the basis of the method of renormalization. 19481949 . Stckelberg, in collaboration with his students, proposed and began to develop a new method for constructing a scattering matrix based not on solving the Schrdinger equation, but on the general physical conditions of relativistic invariance, unitaryity, and causality clearly formulated for it. However, its biggest result is the discovery together with A. Petermann was a special group of transformations in renormalized quantum field theory (1953), which they called the "normation group".