I analyze the role of infinite idealizations used in renormalization group (RG hereafter) method explaining universality across microscopically different physical systems critical phenomena. argue that despite reference to limit such as with correlation lengths during RG process, key phenomena need not involve systems. develop my argument by introducing what regard explanatorily relevant proper...

In this pedagogical article, we explore a powerful language for describing the notion of spacetime and particle dynamics intrinsic to given fundamental physical theory, focusing on special relativity its Newtonian limit. The starting point formulation is representations symmetries. Moreover, that seriously furnishes—via symmetry contractions—a natural way in which one can understand how theory ...