Special relativity and quantum theory; a collection of papers on the poincaré group

... hand, and the laws of nature on the other hand, is the appealing feature of the proposition It has, actually, two alarming features The first of these is that a symmetry operation is, physically,... separate the ~eory of special relativity from quantum theory, there IS hardly any common ground between the general theory of relativity and quantum mechanics The statement, that there are no conceptual... quantum theory on the one hand, and general relativity and quantum theory on the other Most of the conclusions which will be reported on in connection with the general theory have been arrived at